Create RenderFrame/RenderFrameHost for the main frame of a page.

content/browser/renderer_host/render_view_host_browsertest.cc

Index: content/browser/renderer_host/render_view_host_browsertest.cc
diff --git a/content/browser/renderer_host/render_view_host_browsertest.cc b/content/browser/renderer_host/render_view_host_browsertest.cc
index 8fb43e567f2c64aa9fa75551f066b8d740af9415..0bd8f1e3b299c568f109671b0eec891102abd9c3 100644
--- a/content/browser/renderer_host/render_view_host_browsertest.cc
+++ b/content/browser/renderer_host/render_view_host_browsertest.cc
@@ -92,4 +92,27 @@ IN_PROC_BROWSER_TEST_F(RenderViewHostTest, BaseURLParam) {
   EXPECT_EQ("http://www.google.com/", observer.base_url().spec());
 }
 
+// This test ensures a RenderFrameHost object is created for the top level frame
+// in each RenderViewHost.
+IN_PROC_BROWSER_TEST_F(RenderViewHostTest, BasicRenderFrameHost) {
+  ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
+
+  GURL test_url = embedded_test_server()->GetURL("/simple_page.html");
+  NavigateToURL(shell(), test_url);
+
+  RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
+      shell()->web_contents()->GetRenderViewHost());
+  EXPECT_TRUE(rvh->main_render_frame_host_.get());
+
+  ShellAddedObserver new_shell_observer;
+  EXPECT_TRUE(ExecuteScript(shell()->web_contents(), "window.open();"));
+  Shell* new_shell = new_shell_observer.GetShell();
+  RenderViewHostImpl* new_rvh = static_cast<RenderViewHostImpl*>(
+      new_shell->web_contents()->GetRenderViewHost());
+
+  EXPECT_TRUE(new_rvh->main_render_frame_host_.get());
+  EXPECT_NE(rvh->main_render_frame_host_->routing_id(),
+            new_rvh->main_render_frame_host_->routing_id());
+}
+
 }  // namespace content