Support fullscreen for non-video elements in the WebView.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 3e8b30386e3fcfe0802ac25b67b11a40069f6c06..316d7b174cdc357f9cd2dcf136e916f9d3439488 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1708,8 +1708,10 @@ void RenderWidget::DidToggleFullscreen() {
 
   if (is_fullscreen_) {
     webwidget_->didEnterFullScreen();
+    Send(new ViewHostMsg_DidEnterFullscreen(routing_id_));
   } else {
     webwidget_->didExitFullScreen();
+    Send(new ViewHostMsg_DidExitFullscreen(routing_id_));
   }
 }