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diff --git a/Source/WebKit/chromium/public/WebFont.h b/Source/WebKit/chromium/public/WebFont.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 WebFont_h
+#define WebFont_h
+
+#include "WebCanvas.h"
+#include "WebColor.h"
+#include "WebCommon.h"
+
+namespace WebKit {
+
+struct WebFontDescription;
+struct WebFloatPoint;
+struct WebFloatRect;
+struct WebPoint;
+struct WebRect;
+struct WebTextRun;
+
+class WebFont {
+public:
+    virtual ~WebFont() { }
+
+    WEBKIT_API static WebFont* create(const WebFontDescription&);
+
+    virtual WebFontDescription fontDescription() const = 0;
+
+    virtual int ascent() const = 0;
+    virtual int descent() const = 0;
+    virtual int height() const = 0;
+    virtual int lineSpacing() const = 0;
+    virtual float xHeight() const = 0;
+
+    // Draws the text run to the given canvas. The text is positioned at the
+    // given left-hand point at the baseline.
+    //
+    // The text will be clipped to the given clip rect. |canvasIsOpaque| is
+    // used to control whether subpixel antialiasing is possible. If there is a
+    // possibility the area drawn could be semi-transparent, subpixel
+    // antialiasing will be disabled.
+    //
+    // |from| and |to| allow the caller to specify a subrange of the given text
+    // run to draw. If |to| is -1, the entire run will be drawn.
+    virtual void drawText(WebCanvas*, const WebTextRun&, const WebFloatPoint& leftBaseline, WebColor,
+                          const WebRect& clip, bool canvasIsOpaque,
+                          int from = 0, int to = -1) const = 0;
+
+    // Measures the width in pixels of the given text run.
+    virtual int calculateWidth(const WebTextRun&) const = 0;
+
+    // Returns the character offset corresponding to the given horizontal pixel
+    // position as measured from from the left of the run.
+    virtual int offsetForPosition(const WebTextRun&, float position) const = 0;
+
+    // Returns the rectangle representing the selection rect for the subrange
+    // |from| -> |to| of the given text run. You can use -1 for |to| to specify
+    // the entire run (this will do something similar to calling width()).
+    //
+    // The rect will be positioned as if the text was drawn at the given
+    // |leftBaseline| position. |height| indicates the height of the selection
+    // rect you want, typically this will just be the height() of this font.
+    //
+    // To get the pixel offset of some character (the opposite of
+    // offsetForPosition()), pass in a |leftBaseline| = (0, 0), |from| = 0, and
+    // |to| = the character you want. The right edge of the resulting selection
+    // rect will tell you the right side of the character.
+    virtual WebFloatRect selectionRectForText(const WebTextRun&, const WebFloatPoint& leftBaseline,
+                                              int height, int from = 0, int to = -1) const = 0;
+};
+
+} // namespace WebKit
+
+#endif