Make TracingImpl take a Shell* and args, instead of an ApplicationImpl*.

services/dart/content_handler_app.cc

 // Copyright 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 "services/dart/content_handler_app.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_split.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
@@ skipping 114 matching lines @@
         callback.Run();
       });
 }
 
 bool DartContentHandlerApp::run_on_message_loop() const {
   return run_on_message_loop_;
 }
 
 void DartContentHandlerApp::Initialize(mojo::ApplicationImpl* app) {
   // Tracing of content handler and controller.
-  tracing_.Initialize(app);
+  tracing_.Initialize(app->shell(), &app->args());
   // Tracing of isolates and VM.
-  dart_tracing_.Initialize(app);
+  dart_tracing_.Initialize(app->shell());
 
   // TODO(qsr): This has no effect for now, as the tracing infrastructure
   // doesn't allow to trace anything before the tracing app connects to the
   // application.
   TRACE_EVENT0("dart_content_handler", "DartContentHandler::Initialize");
 
   default_strict_ = app->HasArg(kEnableStrictMode);
   content_handler_.set_handler_task_runner(
       base::MessageLoop::current()->task_runner());
   strict_content_handler_.set_handler_task_runner(
@@ skipping 103 matching lines @@
   } else {
     // Loading a raw .dart file pointed at by |url|.
     return make_scoped_ptr(
         new DartApp(application_request.Pass(), url, strict_,
                     run_on_message_loop, override_pause_isolates_flags,
                     pause_isolates_on_start, pause_isolates_on_exit));
   }
 }
 
 }  // namespace dart