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diff --git a/WebKit/chromium/src/js/ProfilerAgent.js b/WebKit/chromium/src/js/ProfilerAgent.js
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+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @fileoverview Provides communication interface to remote v8 profiler.
+ */
+
+/**
+ * @constructor
+ */
+devtools.ProfilerAgent = function()
+{
+    RemoteProfilerAgent.didGetActiveProfilerModules = this._didGetActiveProfilerModules.bind(this);
+    RemoteProfilerAgent.didGetLogLines = this._didGetLogLines.bind(this);
+
+    /**
+     * Active profiler modules flags.
+     * @type {number}
+     */
+    this._activeProfilerModules = devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_NONE;
+
+    /**
+     * Interval for polling profiler state.
+     * @type {number}
+     */
+    this._getActiveProfilerModulesInterval = null;
+
+    /**
+     * Profiler log position.
+     * @type {number}
+     */
+    this._logPosition = 0;
+
+    /**
+     * Last requested log position.
+     * @type {number}
+     */
+    this._lastRequestedLogPosition = -1;
+
+    /**
+     * Whether log contents retrieval must be forced next time.
+     * @type {boolean}
+     */
+    this._forceGetLogLines = false;
+
+    /**
+     * Profiler processor instance.
+     * @type {devtools.profiler.Processor}
+     */
+    this._profilerProcessor = new devtools.profiler.Processor();
+};
+
+
+/**
+ * A copy of enum from include/v8.h
+ * @enum {number}
+ */
+devtools.ProfilerAgent.ProfilerModules = {
+    PROFILER_MODULE_NONE: 0,
+    PROFILER_MODULE_CPU: 1,
+    PROFILER_MODULE_HEAP_STATS: 1 << 1,
+    PROFILER_MODULE_JS_CONSTRUCTORS: 1 << 2,
+    PROFILER_MODULE_HEAP_SNAPSHOT: 1 << 16
+};
+
+
+/**
+ * Sets up callbacks that deal with profiles processing.
+ */
+devtools.ProfilerAgent.prototype.setupProfilerProcessorCallbacks = function()
+{
+    // A temporary icon indicating that the profile is being processed.
+    var processingIcon = new WebInspector.SidebarTreeElement(
+        "profile-sidebar-tree-item",
+        WebInspector.UIString("Processing..."),
+        '', null, false);
+    var profilesSidebar = WebInspector.panels.profiles.getProfileType(WebInspector.CPUProfileType.TypeId).treeElement;
+
+    this._profilerProcessor.setCallbacks(
+        function onProfileProcessingStarted() {
+            // Set visually empty string. Subtitle hiding is done via styles
+            // manipulation which doesn't play well with dynamic append / removal.
+            processingIcon.subtitle = " ";
+            profilesSidebar.appendChild(processingIcon);
+        },
+        function onProfileProcessingStatus(ticksCount) {
+            processingIcon.subtitle = WebInspector.UIString("%d ticks processed", ticksCount);
+        },
+        function onProfileProcessingFinished(profile) {
+            profilesSidebar.removeChild(processingIcon);
+            profile.typeId = WebInspector.CPUProfileType.TypeId;
+            InspectorBackend.addFullProfile(profile);
+            WebInspector.addProfileHeader(profile);
+            // If no profile is currently shown, show the new one.
+            var profilesPanel = WebInspector.panels.profiles;
+            if (!profilesPanel.visibleView) {
+                profilesPanel.showProfile(profile);
+            }
+        }
+    );
+};
+
+
+/**
+ * Initializes profiling state.
+ */
+devtools.ProfilerAgent.prototype.initializeProfiling = function()
+{
+    this.setupProfilerProcessorCallbacks();
+    this._forceGetLogLines = true;
+    this._getActiveProfilerModulesInterval = setInterval(function() { RemoteProfilerAgent.getActiveProfilerModules(); }, 1000);
+};
+
+
+/**
+ * Requests the next chunk of log lines.
+ * @param {boolean} immediately Do not postpone the request.
+ * @private
+ */
+devtools.ProfilerAgent.prototype._getNextLogLines = function(immediately)
+{
+    if (this._lastRequestedLogPosition == this._logPosition)
+        return;
+    var pos = this._lastRequestedLogPosition = this._logPosition;
+    if (immediately)
+        RemoteProfilerAgent.getLogLines(pos);
+    else
+        setTimeout(function() { RemoteProfilerAgent.getLogLines(pos); }, 500);
+};
+
+
+/**
+ * Starts profiling.
+ * @param {number} modules List of modules to enable.
+ */
+devtools.ProfilerAgent.prototype.startProfiling = function(modules)
+{
+    var cmd = new devtools.DebugCommand("profile", {
+        "modules": modules,
+        "command": "resume"});
+    devtools.DebuggerAgent.sendCommand_(cmd);
+    RemoteDebuggerAgent.processDebugCommands();
+    if (modules & devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_HEAP_SNAPSHOT) {
+        // Active modules will not change, instead, a snapshot will be logged.
+        this._getNextLogLines();
+    }
+};
+
+
+/**
+ * Stops profiling.
+ */
+devtools.ProfilerAgent.prototype.stopProfiling = function(modules)
+{
+    var cmd = new devtools.DebugCommand("profile", {
+        "modules": modules,
+        "command": "pause"});
+    devtools.DebuggerAgent.sendCommand_(cmd);
+    RemoteDebuggerAgent.processDebugCommands();
+};
+
+
+/**
+ * Handles current profiler status.
+ * @param {number} modules List of active (started) modules.
+ */
+devtools.ProfilerAgent.prototype._didGetActiveProfilerModules = function(modules)
+{
+    var profModules = devtools.ProfilerAgent.ProfilerModules;
+    var profModuleNone = profModules.PROFILER_MODULE_NONE;
+    if (this._forceGetLogLines || (modules !== profModuleNone && this._activeProfilerModules === profModuleNone)) {
+        this._forceGetLogLines = false;
+        // Start to query log data.
+        this._getNextLogLines(true);
+    }
+    this._activeProfilerModules = modules;
+    // Update buttons.
+    WebInspector.setRecordingProfile(modules & profModules.PROFILER_MODULE_CPU);
+};
+
+
+/**
+ * Handles a portion of a profiler log retrieved by getLogLines call.
+ * @param {number} pos Current position in log.
+ * @param {string} log A portion of profiler log.
+ */
+devtools.ProfilerAgent.prototype._didGetLogLines = function(pos, log)
+{
+    this._logPosition = pos;
+    if (log.length > 0)
+        this._profilerProcessor.processLogChunk(log);
+    else {
+        // Allow re-reading from the last position.
+        this._lastRequestedLogPosition = this._logPosition - 1;
+        if (this._activeProfilerModules === devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_NONE)
+            // No new data and profiling is stopped---suspend log reading.
+            return;
+    }
+    this._getNextLogLines();
+};