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

content/browser/renderer_host/legacy_render_widget_host_win.h

 // Copyright (c) 2014 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_LEGACY_RENDER_WIDGET_HOST_WIN_H_
 #define CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_
 
 #include <atlbase.h>
 #include <atlwin.h>
 #include <atlcrack.h>
@@ skipping 71 matching lines @@
     MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate)
     MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor)
     MESSAGE_HANDLER_EX(WM_TOUCH, OnTouch)
     MESSAGE_HANDLER_EX(WM_HSCROLL, OnScroll)
     MESSAGE_HANDLER_EX(WM_VSCROLL, OnScroll)
     MESSAGE_HANDLER_EX(WM_NCHITTEST, OnNCHitTest)
     MESSAGE_RANGE_HANDLER(WM_NCMOUSEMOVE, WM_NCXBUTTONDBLCLK,
                           OnMouseRange)
     MESSAGE_HANDLER_EX(WM_NCCALCSIZE, OnNCCalcSize)
     MESSAGE_HANDLER_EX(WM_SIZE, OnSize)
+    MESSAGE_HANDLER_EX(WM_WINDOWPOSCHANGED, OnWindowPosChanged)
   END_MSG_MAP()
 
   HWND hwnd() { return m_hWnd; }
 
   // Called when the child window is to be reparented to a new window.
   // The |parent| parameter contains the new parent window.
   void UpdateParent(HWND parent);
   HWND GetParent();
 
   IAccessible* window_accessible() { return window_accessible_.get(); }
@@ skipping 33 matching lines @@
   LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnTouch(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnScroll(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnNCHitTest(UINT message, WPARAM w_param, LPARAM l_param);
 
   LRESULT OnNCPaint(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnPaint(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnNCCalcSize(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnSize(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnWindowPosChanged(UINT message, WPARAM w_param, LPARAM l_param);
 
   base::win::ScopedComPtr<IAccessible> window_accessible_;
 
   // Set to true if we turned on mouse tracking.
   bool mouse_tracking_enabled_;
 
   RenderWidgetHostViewAura* host_;
 
   // This class provides functionality to register the legacy window as a
   // Direct Manipulation consumer. This allows us to support smooth scroll
   // in Chrome on Windows 10.
   scoped_ptr<gfx::win::DirectManipulationHelper> direct_manipulation_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(LegacyRenderWidgetHostHWND);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_