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 664fa9e9c1040510aa0713cb32631802f659689c..09cee961abb013eb04e4dbd82beb59e134eb3999 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -211,6 +211,11 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Returns the associated RenderViewHostDelegateView*, if possible.
   virtual RenderViewHostDelegateView* GetDelegateView();
 
+  // Returns the current Flash fullscreen RenderWidgetHostImpl if any. This is
+  // not intended for use with other types of fullscreen, such as HTML
+  // fullscreen, and will return nullptr for those cases.
+  virtual RenderWidgetHostImpl* GetFullscreenRenderWidgetHost() const;
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };