Adds link disambiguation popup support to Windows.

content/public/browser/web_contents_view_delegate.h

Index: content/public/browser/web_contents_view_delegate.h
diff --git a/content/public/browser/web_contents_view_delegate.h b/content/public/browser/web_contents_view_delegate.h
index b0e3f6255b90fd9be86762263706cd7b71a78a56..934018098216c313a5da36f944dec2116aee41a2 100644
--- a/content/public/browser/web_contents_view_delegate.h
+++ b/content/public/browser/web_contents_view_delegate.h
@@ -9,7 +9,9 @@
 #import <Cocoa/Cocoa.h>
 #endif
 
+#include "base/callback_forward.h"
 #include "content/common/content_export.h"
+#include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_MACOSX)
@@ -22,6 +24,7 @@ class Size;
 
 namespace ui {
 class FocusStoreGtk;
+class GestureEvent;
 }
 
 namespace content {
@@ -43,6 +46,21 @@ class CONTENT_EXPORT WebContentsViewDelegate {
   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
                                const ContextMenuParams& params) = 0;
 
+#if defined(OS_WIN)
+  // Shows a popup window containing the |zoomed_bitmap| of web content with
+  // more than one link, allowing the user to more easily select which link
+  // they were trying to touch. |target_rect| is the rectangle in DIPs in the
+  // coordinate system of |content| that has been scaled up in |zoomed_bitmap|.
+  // Should the popup receive any gesture events they should be translated back
+  // to the coordinate system of |content| and then provided to the |callback|
+  // for forwarding on to the original scale web content.
+  typedef base::Callback<void(ui::GestureEvent* event)> GestureCallback;
+  virtual void ShowLinkDisambiguationPopup(const gfx::Rect& target_rect,
+                                           const SkBitmap& zoomed_bitmap,
+                                           const gfx::NativeView content,
+                                           const GestureCallback callback) = 0;

[jam, 2014/07/30 20:29:03]

const reference

[luken, 2014/07/31 01:41:47]

Done.

+#endif
+
 #if defined(USE_AURA)
   // These methods allow the embedder to intercept WebContentsViewWin's
   // implementation of these WebContentsView methods. See the WebContentsView