Adds a way to determine id of content handler that created app

mandoline/ui/aura/surface_binding.cc

 // Copyright 2015 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 "mandoline/ui/aura/surface_binding.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/software_output_device.h"
 #include "cc/resources/shared_bitmap_manager.h"
 #include "components/view_manager/public/cpp/view.h"
 #include "components/view_manager/public/cpp/view_tree_connection.h"
 #include "components/view_manager/public/interfaces/gpu.mojom.h"
 #include "mandoline/ui/aura/window_tree_host_mojo.h"
 #include "mojo/application/public/cpp/connect.h"
 #include "mojo/application/public/interfaces/shell.mojom.h"
 #include "mojo/cc/context_provider_mojo.h"
 #include "mojo/cc/output_surface_mojo.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/surfaces/surfaces_type_converters.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace mandoline {
+namespace {
+void OnGotContentHandlerID(uint32_t content_handler_id) {}
+}  // namespace
 
 // PerConnectionState ----------------------------------------------------------
 
 // State needed per ViewManager. Provides the real implementation of
 // CreateOutputSurface. SurfaceBinding obtains a pointer to the
 // PerConnectionState appropriate for the ViewManager. PerConnectionState is
 // stored in a thread local map. When no more refereces to a PerConnectionState
 // remain the PerConnectionState is deleted and the underlying map cleaned up.
 class SurfaceBinding::PerConnectionState
     : public base::RefCounted<PerConnectionState> {
@@ skipping 74 matching lines @@
   if (view_map->empty()) {
     delete view_map;
     view_states.Pointer()->Set(nullptr);
   }
 }
 
 void SurfaceBinding::PerConnectionState::Init() {
   mojo::ServiceProviderPtr service_provider;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From("mojo:view_manager");
-  shell_->ConnectToApplication(request.Pass(),
-                               GetProxy(&service_provider),
-                               nullptr,
-                               nullptr);
+  shell_->ConnectToApplication(request.Pass(), GetProxy(&service_provider),
+                               nullptr, nullptr,
+                               base::Bind(&OnGotContentHandlerID));
   ConnectToService(service_provider.get(), &gpu_);
 }
 
 // SurfaceBinding --------------------------------------------------------------
 
 SurfaceBinding::SurfaceBinding(mojo::Shell* shell, mojo::View* view)
     : view_(view),
       state_(PerConnectionState::Get(shell, view->connection())) {
 }
 
 SurfaceBinding::~SurfaceBinding() {
 }
 
 scoped_ptr<cc::OutputSurface> SurfaceBinding::CreateOutputSurface() {
   return state_->CreateOutputSurface(view_);
 }
 
 }  // namespace mandoline