RenderFrame: flesh out Observer

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 3e000ac0afb3ede2080e08cc572d53be38f01e98..3e70085d082f59f719cb9c318cb76307c48f9e73 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -376,6 +376,12 @@ void ChromeContentRendererClient::RenderFrameCreated(
     if (prerender::PrerenderHelper::IsPrerendering(parent_frame))
       new prerender::PrerenderHelper(render_frame);
   }
+
+  if (render_frame->GetRenderView()->GetMainRenderFrame() == render_frame) {
+    // Only attach NetErrorHelper to the main frame, since only the main frame
+    // should get error pages.
+    new NetErrorHelper(render_frame);
+  }
 }
 
 void ChromeContentRendererClient::RenderViewCreated(
@@ -404,8 +410,6 @@ void ChromeContentRendererClient::RenderViewCreated(
     new SearchBox(render_view);
 
   new ChromeRenderViewObserver(render_view, chrome_observer_.get());
-
-  new NetErrorHelper(render_view);
 }
 
 void ChromeContentRendererClient::SetNumberOfViews(int number_of_views) {
@@ -998,7 +1002,14 @@ void ChromeContentRendererClient::GetNavigationErrorStrings(
                                               "t");
       }
     } else {
-      NetErrorHelper* helper = NetErrorHelper::Get(render_view);
+      // TODO(ellyjones): change GetNavigationErrorStrings to take a RenderFrame
+      // instead of a RenderView, then pass that in.
+      // This is safe for now because we only install the NetErrorHelper on the
+      // main render frame anyway; see the TODO(ellyjones) in
+      // RenderFrameCreated.
+      content::RenderFrame* main_render_frame =
+          render_view->GetMainRenderFrame();
+      NetErrorHelper* helper = NetErrorHelper::Get(main_render_frame);
       helper->GetErrorHTML(frame, error, is_post, error_html);
     }
   }