Adds link disambiguation popup support to Windows.

content/public/browser/web_contents_view_delegate.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_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_DELEGATE_H_
 
 #if defined(__OBJC__)
 #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(__OBJC__)
 @protocol RenderWidgetHostViewMacDelegate;
 #endif
 
 namespace gfx {
 class Size;
 }
 
+namespace ui {
+class GestureEvent;
+}
+
 namespace content {
 class RenderFrameHost;
 class RenderWidgetHost;
 class WebDragDestDelegate;
 struct ContextMenuParams;
 
 // This interface allows a client to extend the functionality of the
 // WebContentsView implementation.
 class CONTENT_EXPORT WebContentsViewDelegate {
  public:
   virtual ~WebContentsViewDelegate();
 
   // Returns a delegate to process drags not handled by content.
   virtual WebDragDestDelegate* GetDragDestDelegate();
 
   // Shows a context menu.
   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
                                const ContextMenuParams& params);
 
   // These methods allow the embedder to intercept a WebContentsView's
   // implementation of these methods. See the WebContentsView interface
   // documentation for more information about these methods.
   virtual void StoreFocus();
   virtual void RestoreFocus();
   virtual bool Focus();
   virtual void TakeFocus(bool reverse);
   virtual void SizeChanged(const gfx::Size& size);
 
+#if defined(TOOLKIT_VIEWS)
+  // 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 ShowDisambiguationPopup(const gfx::Rect& target_rect,
+                                       const SkBitmap& zoomed_bitmap,
+                                       const gfx::NativeView content,
+                                       const GestureCallback& callback) = 0;
+  // Hides the link disambiguation popup window if it is showing, otherwise does
+  // nothing.
+  virtual void HideDisambiguationPopup() = 0;
+#endif
+
   // Returns a newly-created delegate for the RenderWidgetHostViewMac, to handle
   // events on the responder chain.
 #if defined(__OBJC__)
   virtual NSObject<RenderWidgetHostViewMacDelegate>*
       CreateRenderWidgetHostViewDelegate(
           RenderWidgetHost* render_widget_host);
 #else
   virtual void* CreateRenderWidgetHostViewDelegate(
       RenderWidgetHost* render_widget_host);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_DELEGATE_H_