Introduce intercepting and handling devtools messages in the renderer.

content/browser/devtools/devtools_http_handler_impl.cc

 // Copyright (c) 2012 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 "content/browser/devtools/devtools_http_handler_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 605 matching lines @@
     return;
   std::string browser_prefix = "/devtools/browser";
   size_t browser_pos = request.path.find(browser_prefix);
   if (browser_pos == 0) {
     if (browser_target_) {
       Send500(connection_id, "Another client already attached");
       return;
     }
     browser_target_.reset(new DevToolsBrowserTarget(
         thread_->message_loop_proxy().get(), server_.get(), connection_id));
-    browser_target_->RegisterDomainHandler(new DevToolsTracingHandler());
+    browser_target_->RegisterDomainHandler(
+        new DevToolsTracingHandler(browser_target_->GetNotifier()));

[pfeldman, 2013/02/13 17:38:24]

It is unfortunate browser target can't set itself as a notifier - your
overriding implementation that doesn't need notifications becomes overly
complex. I'd suggest adding public SetNotifier on Handler intead.

[kkania, 2013/02/13 19:17:19]

Done.

     AcceptWebSocket(connection_id, request);
     return;
   }
 
   std::string page_prefix = "/devtools/page/";
   size_t pos = request.path.find(page_prefix);
   if (pos != 0) {
     Send404(connection_id);
     return;
   }
@@ skipping 252 matching lines @@
                                              page_info.id.c_str()));
     std::string devtools_frontend_url = GetFrontendURLInternal(
         page_info.id.c_str(),
         host);
     dictionary->SetString("devtoolsFrontendUrl", devtools_frontend_url);
   }
   return dictionary;
 }
 
 }  // namespace content