Start using RenderFrameProxyHost objects.

content/browser/frame_host/frame_tree_browsertest.cc

Index: content/browser/frame_host/frame_tree_browsertest.cc
diff --git a/content/browser/frame_host/frame_tree_browsertest.cc b/content/browser/frame_host/frame_tree_browsertest.cc
index bc5f1cb04ff32d92ed415cfc66933323e8d33ff5..2876d064a9c92f48f9cb53c89113030ff5799dfe 100644
--- a/content/browser/frame_host/frame_tree_browsertest.cc
+++ b/content/browser/frame_host/frame_tree_browsertest.cc
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/command_line.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
@@ -15,6 +17,7 @@
 #include "content/public/test/test_navigation_observer.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
+#include "content/test/content_browser_test_utils_internal.h"
 #include "net/dns/mock_host_resolver.h"
 
 namespace content {
@@ -155,4 +158,61 @@ IN_PROC_BROWSER_TEST_F(FrameTreeBrowserTest, NavigateWithLeftoverFrames) {
   EXPECT_EQ(0UL, root->child_count());
 }
 
+class CrossProcessFrameTreeBrowserTest : public ContentBrowserTest {
+ public:
+  CrossProcessFrameTreeBrowserTest() {}
+
+  virtual void SetUpCommandLine(base::CommandLine* command_line) OVERRIDE {
+    command_line->AppendSwitch(switches::kSitePerProcess);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CrossProcessFrameTreeBrowserTest);
+};
+
+// Ensure that we can complete a cross-process subframe navigation.
+IN_PROC_BROWSER_TEST_F(CrossProcessFrameTreeBrowserTest,
+                       CreateCrossProcessSubframeProxies) {
+  host_resolver()->AddRule("*", "127.0.0.1");
+  ASSERT_TRUE(test_server()->Start());
+  GURL main_url(test_server()->GetURL("files/site_per_process_main.html"));
+  NavigateToURL(shell(), main_url);
+
+  // It is safe to obtain the root frame tree node here, as it doesn't change.
+  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
+                            ->GetFrameTree()->root();
+
+  // Load same-site page into iframe.
+  GURL http_url(test_server()->GetURL("files/title1.html"));
+  NavigateFrameToURL(root->child_at(0), http_url);
+
+  // These must stay in scope with replace_host.
+  GURL::Replacements replace_host;
+  std::string foo_com("foo.com");
+
+  // Load cross-site page into iframe.
+  GURL cross_site_url(test_server()->GetURL("files/title2.html"));
+  replace_host.SetHostStr(foo_com);
+  cross_site_url = cross_site_url.ReplaceComponents(replace_host);
+  NavigateFrameToURL(root->child_at(0), cross_site_url);
+
+  // Ensure that we have created a new process for the subframe.
+  ASSERT_EQ(1U, root->child_count());
+  FrameTreeNode* child = root->child_at(0);
+  SiteInstance* site_instance = child->current_frame_host()->GetSiteInstance();
+  RenderViewHost* rvh = child->current_frame_host()->render_view_host();
+  RenderProcessHost* rph = child->current_frame_host()->GetProcess();
+
+  EXPECT_NE(shell()->web_contents()->GetRenderViewHost(), rvh);
+  EXPECT_NE(shell()->web_contents()->GetSiteInstance(), site_instance);
+  EXPECT_NE(shell()->web_contents()->GetRenderProcessHost(), rph);
+
+  // Ensure that the root node has a proxy for the child node's SiteInstance.
+  EXPECT_TRUE(root->render_manager()->proxy_hosts_[site_instance->GetId()]);
+
+  // Also ensure that the child has a proxy for the root node's SiteInstance.
+  EXPECT_TRUE(child->render_manager()->proxy_hosts_[
+              root->current_frame_host()->GetSiteInstance()->GetId()]);
+}
+
 }  // namespace content