Adds support for hittesting points on surface quads

content/browser/renderer_host/render_widget_host_view_base.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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 159 matching lines @@
                                       InputEventAckState ack_result) {}
 
   virtual void DidOverscroll(const DidOverscrollParams& params) {}
 
   virtual void DidStopFlinging() {}
 
   // Returns the compositing surface ID namespace, or 0 if Surfaces are not
   // enabled.
   virtual uint32_t GetSurfaceIdNamespace();
 
+  // When there are multiple RenderWidgetHostViews for a single page, input
+  // events need to be targeted to the correct one for handling. The following
+  // methods are invoked on the RenderWidgetHostView that should be able to
+  // properly handle the event (i.e. it has focus for keyboard events, or has
+  // been identified by hit testing mouse, touch or gesture events).
+  virtual uint32_t SurfaceIdNamespaceAtPoint(const gfx::Point& point);
+
   //----------------------------------------------------------------------------
   // The following static methods are implemented by each platform.
 
   static void GetDefaultScreenInfo(blink::WebScreenInfo* results);
 
   //----------------------------------------------------------------------------
   // The following pure virtual methods are implemented by derived classes.
 
   // Perform all the initialization steps necessary for this object to represent
   // a popup (such as a <select> dropdown), then shows the popup at |pos|.
@@ skipping 226 matching lines @@
   base::OneShotTimer<RenderWidgetHostViewBase> flush_input_timer_;
 
   base::WeakPtrFactory<RenderWidgetHostViewBase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_