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..8342234b820f99600ed5413b6f199ed01e965d47 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -204,6 +204,10 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // 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() {}
 };