[DevTools] Fix a couple of issues for cross-site RFDTAH, add a test.

content/browser/devtools/site_per_process_devtools_browsertest.cc

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/run_loop.h"
 #include "build/build_config.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/site_per_process_browsertest.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/devtools_agent_host.h"
@@ skipping 80 matching lines @@
   GURL::Replacements replace_host;
   GURL cross_site_url(embedded_test_server()->GetURL("/title2.html"));
   replace_host.SetHostStr("foo.com");
   cross_site_url = cross_site_url.ReplaceComponents(replace_host);
   NavigateFrameToURL(root->child_at(0), cross_site_url);
 
   list = DevToolsAgentHost::GetOrCreateAll();
   EXPECT_EQ(2U, list.size());
   EXPECT_EQ(DevToolsAgentHost::kTypePage, list[0]->GetType());
   EXPECT_EQ(main_url.spec(), list[0]->GetURL().spec());
-  EXPECT_EQ(DevToolsAgentHost::kTypePage, list[1]->GetType());
+  EXPECT_EQ(DevToolsAgentHost::kTypeFrame, list[1]->GetType());
   EXPECT_EQ(cross_site_url.spec(), list[1]->GetURL().spec());
   EXPECT_EQ(std::string(), list[0]->GetParentId());
   EXPECT_EQ(list[0]->GetId(), list[1]->GetParentId());
   EXPECT_NE(list[1]->GetId(), list[0]->GetId());
 
   // Attaching to both agent hosts.
   scoped_refptr<DevToolsAgentHost> child_host = list[1];
   TestClient child_client;
   child_host->AttachClient(&child_client);
   scoped_refptr<DevToolsAgentHost> parent_host = list[0];
@@ skipping 90 matching lines @@
   EXPECT_EQ(child_frame_agent->GetParentId(), main_frame_agent->GetId());
   EXPECT_NE(child_frame_agent->GetId(), main_frame_agent->GetId());
 
   // Agent for web contents should be the the main frame's one.
   scoped_refptr<DevToolsAgentHost> page_agent =
       DevToolsAgentHost::GetOrCreateFor(shell()->web_contents());
   EXPECT_EQ(page_agent.get(), main_frame_agent.get());
 }
 
 }  // namespace content