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diff --git a/WebKit/chromium/public/WebFloatRect.h b/WebKit/chromium/public/WebFloatRect.h
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+++ b/WebKit/chromium/public/WebFloatRect.h
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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.
+ */
+
+#ifndef WebFloatRect_h
+#define WebFloatRect_h
+
+#include "WebCommon.h"
+
+#if WEBKIT_IMPLEMENTATION
+#include "FloatRect.h"
+#endif
+
+namespace WebKit {
+
+struct WebFloatRect {
+    float x;
+    float y;
+    float width;
+    float height;
+
+    bool isEmpty() const { return width <= 0 || height <= 0; }
+
+    WebFloatRect()
+        : x(0.0f)
+        , y(0.0f)
+        , width(0.0f)
+        , height(0.0f)
+    {
+    }
+
+    WebFloatRect(float x, float y, float width, float height)
+        : x(x)
+        , y(y)
+        , width(width)
+        , height(height)
+    {
+    }
+
+#if WEBKIT_IMPLEMENTATION
+    WebFloatRect(const WebCore::FloatRect& r)
+        : x(r.x())
+        , y(r.y())
+        , width(r.width())
+        , height(r.height())
+    {
+    }
+
+    WebFloatRect& operator=(const WebCore::FloatRect& r)
+    {
+        x = r.x();
+        y = r.y();
+        width = r.width();
+        height = r.height();
+        return *this;
+    }
+
+    operator WebCore::FloatRect() const
+    {
+        return WebCore::FloatRect(x, y, width, height);
+    }
+#endif
+};
+
+inline bool operator==(const WebFloatRect& a, const WebFloatRect& b)
+{
+    return a.x == b.x && a.y == b.y && a.width == b.width && a.height == b.height;
+}
+
+inline bool operator!=(const WebFloatRect& a, const WebFloatRect& b)
+{
+    return !(a == b);
+}
+
+} // namespace WebKit
+
+#endif