Remove the CHECK from the DirectManipulationHelper::Activate function as it is firing in Canary on …

ui/gfx/win/direct_manipulation.h

 // Copyright 2015 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_GFX_WIN_DIRECT_MANIPULATION_H_
 #define UI_GFX_WIN_DIRECT_MANIPULATION_H_
 
 #include <directmanipulation.h>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 34 matching lines @@
 
   // This function instantiates Direct Manipulation and creates a viewport for
   // the passed in |window|.
   // consumer. Most of the code is boiler plate and is based on the sample.
   void Initialize(HWND window);
 
   // Sets the bounds of the fake Direct manipulation viewport to match those
   // of the legacy window.
   void SetBounds(const gfx::Rect& bounds);
 
-  // Registers the passed in |window| as a Direct Manipulation consumer.
+  // Registers and activates the passed in |window| as a Direct Manipulation
+  // consumer.
   void Activate(HWND window);
 
+  // Deactivates Direct Manipulation processing on the passed in |window|.
+  void Deactivate(HWND window);
+
   // Passes the WM_MOUSEWHEEL messages to Direct Manipulation. This is for
   // logistics purposes.
   void HandleMouseWheel(HWND window, UINT message, WPARAM w_param,
       LPARAM l_param);
 
   ~DirectManipulationHelper();
 
  private:
   DirectManipulationHelper();
 
   base::win::ScopedComPtr<IDirectManipulationManager2> manager_;
   base::win::ScopedComPtr<IDirectManipulationCompositor> compositor_;
   base::win::ScopedComPtr<IDirectManipulationUpdateManager> update_manager_;
   base::win::ScopedComPtr<IDirectManipulationFrameInfoProvider> frame_info_;
   base::win::ScopedComPtr<IDirectManipulationViewport2> view_port_outer_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectManipulationHelper);
 };
 
 }  // namespace win
 }  // namespace gfx
 
 #endif  // UI_GFX_WIN_DIRECT_MANIPULATION_H_