Re-route Touchscreen GesturePinch events to root view.

content/browser/renderer_host/render_widget_host_impl.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_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 245 matching lines @@
 
   // Notifies the RenderWidget that it lost the mouse lock.
   void SendMouseLockLost();
 
   // Noifies the RenderWidget of the current mouse cursor visibility state.
   void SendCursorVisibilityState(bool is_visible);
 
   // Notifies the RenderWidgetHost that the View was destroyed.
   void ViewDestroyed();
 
+  // Signals if this host has forwarded a GestureScrollBegin without yet having
+  // forwarded a matching GestureScrollEnd/GestureFlingStart.
+  bool is_in_touchscreen_gesture_scroll() const {
+    return is_in_touchscreen_gesture_scroll_;
+  }
+
 #if defined(OS_MACOSX)
   // Pause for a moment to wait for pending repaint or resize messages sent to
   // the renderer to arrive. If pending resize messages are for an old window
   // size, then also pump through a new resize message if there is time.
   void PauseForPendingResizeOrRepaints();
 
   // Whether pausing may be useful.
   bool CanPauseForPendingResizeOrRepaints();
 
   // Wait for a surface matching the size of the widget's view, possibly
@@ skipping 551 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_