Fix TextInputClientMac related crashes of Fullscreen RenderWidget

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 6948db4991a46e1b9a1f312a5bdc7f1f9a3e2079..541f95f3bc3b586b1164bbd56bdf9bc66e1d3ab7 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -204,6 +204,9 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // 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() {}
 };