blimp: Update page load status update indicator to use first paint.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 5621f827b46d1f009ff3cb81d369fc9adbb12d02..408a52331edcf2a7b63c1d6a27f293d546ab3619 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2369,6 +2369,12 @@ void WebContentsImpl::SendScreenRects() {
     browser_plugin_embedder_->DidSendScreenRects();
 }
 
+void WebContentsImpl::OnFirstPaintAfterLoad(
+    RenderWidgetHostImpl* render_widget_host) {
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
+                    DidFirstPaintAfterLoad(render_widget_host));
+}
+
 BrowserAccessibilityManager*
     WebContentsImpl::GetRootBrowserAccessibilityManager() {
   RenderFrameHostImpl* rfh = GetMainFrame();