events: Change gesture-event handler in EventHandler to not return any values.

ui/views/view.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 UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <algorithm>
 #include <map>
 #include <set>
@@ skipping 637 matching lines @@
 
   // Overridden from ui::EventTarget:
   virtual bool CanAcceptEvents() OVERRIDE;
   virtual ui::EventTarget* GetParentTarget() OVERRIDE;
 
   // Overridden from ui::EventHandler:
   virtual ui::EventResult OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual ui::EventResult OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual ui::EventResult OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
   virtual ui::EventResult OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
   // Accelerators --------------------------------------------------------------
 
   // Sets a keyboard accelerator for that view. When the user presses the
   // accelerator key combination, the AcceleratorPressed method is invoked.
   // Note that you can set multiple accelerators for a view by invoking this
   // method several times. Note also that AcceleratorPressed is invoked only
   // when CanHandleAccelerators() is true.
   virtual void AddAccelerator(const ui::Accelerator& accelerator);
 
@@ skipping 624 matching lines @@
   // RootView invokes these. These in turn invoke the appropriate OnMouseXXX
   // method. If a drag is detected, DoDrag is invoked.
   bool ProcessMousePressed(const ui::MouseEvent& event, DragInfo* drop_info);
   bool ProcessMouseDragged(const ui::MouseEvent& event, DragInfo* drop_info);
   void ProcessMouseReleased(const ui::MouseEvent& event);
 
   // RootView will invoke this with incoming TouchEvents. Returns the result
   // of OnTouchEvent.
   ui::EventResult ProcessTouchEvent(ui::TouchEvent* event);
 
-  // RootView will invoke this with incoming GestureEvents. This will invoke
-  // OnGestureEvent and return the result.
-  ui::EventResult ProcessGestureEvent(ui::GestureEvent* event);
+  // RootView will invoke this with incoming GestureEvents. This invokes
+  // OnGestureEvent.
+  void ProcessGestureEvent(ui::GestureEvent* event);
 
   // Accelerators --------------------------------------------------------------
 
   // Registers this view's keyboard accelerators that are not registered to
   // FocusManager yet, if possible.
   void RegisterPendingAccelerators();
 
   // Unregisters all the keyboard accelerators associated with this view.
   // |leave_data_intact| if true does not remove data from accelerators_ array,
   // so it could be re-registered with other focus manager
@@ skipping 177 matching lines @@
   base::win::ScopedComPtr<NativeViewAccessibilityWin>
       native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_