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 flash fullscreen RenderWidgetHostImpl if any. This will

[alexmos, 2016/11/08 18:27:09]

nit: s/flash/Flash/

+  // not return other forms of fullscreen widget such as HTML5.

[alexmos, 2016/11/08 18:27:09]

Let's just say "This is not intended for use with other types of fullscreen,
such as HTML fullscreen, and will return nullptr for those cases."  The current
sentence implies there's a fullscreen widget for HTML fullscreen, but there
actually isn't (instead, the frame's existing widget is resized to fill the
entire screen).

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