Fix TextInputClientMac related crashes of Fullscreen RenderWidget

content/browser/renderer_host/render_widget_host_delegate.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_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 186 matching lines @@
 
   // Returns the TextInputManager tracking text input state.
   virtual TextInputManager* GetTextInputManager();
 
   // Returns true if this RenderWidgetHost should remain hidden. This is used by
   // the RenderWidgetHost to ask the delegate if it can be shown in the event of
   // something other than the WebContents attempting to enable visibility of
   // this RenderWidgetHost.
   virtual bool IsHidden();
 
+  // Returns the current fullscreen RenderWidgetHostImpl if any.

[alexmos, 2016/11/04 20:34:03]

Maybe also note that this is only used for Flash fullscreen and will return
nullptr for other kinds of fullscreen, like HTML5 fullscreen.  (To prevent
someone from misusing it in the future.)

[EhsanK, 2016/11/08 16:59:44]

Acknowledged. Thanks! Does the new comment sound better?

+  virtual RenderWidgetHostImpl* GetFullscreenRenderWidgetHost() const;
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_