Implement disambiguation popup

content/renderer/disambiguation_popup_helper.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_DISAMBIGUATION_POPUP_HELPER_H_
+#define CONTENT_RENDERER_DISAMBIGUATION_POPUP_HELPER_H_
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
+
+namespace gfx {
+  class Rect;

[darin (slow to review), 2012/08/31 23:00:16]

nit: do not indent

+  class Size;
+};

[darin (slow to review), 2012/08/31 23:00:16]

nit: no ';'

+
+namespace WebKit {
+  class WebRect;

[darin (slow to review), 2012/08/31 23:00:16]

nit: do not indent

+};

[darin (slow to review), 2012/08/31 23:00:16]

nit: no ';'

+
+// Contains functions to calculate proper scaling factor and popup size
+class DisambiguationPopupHelper {
+public:
+  static float ComputeZoomAreaAndScaleFactor(gfx::Rect& zoom_rect,

[darin (slow to review), 2012/08/31 23:00:16]

nit: move zoom_rect down to the next line:

  static float ComputeZoomAreaAndScaleFactor(
      gfx::Rect& zoom_rect,
      ...);

Note: zoom_rect should be passed as a pointer instead, and it should be the last
argument.

+      const gfx::Rect& tap_rect,
+      const WebKit::WebVector<WebKit::WebRect>& target_rects,
+      const gfx::Size& viewport_size);
+};
+
+#endif // CONTENT_RENDERER_DISAMBIGUATION_POPUP_HELPER_H_