Revert of Move content's shell connections to the IO thread

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 151 matching lines @@
 #include "ipc/attachment_broker.h"
 #include "ipc/attachment_broker_privileged.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_channel_mojo.h"
 #include "ipc/ipc_logging.h"
 #include "ipc/ipc_switches.h"
 #include "media/base/media_switches.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ppapi/shared_impl/ppapi_switches.h"
-#include "services/shell/public/cpp/interface_provider.h"
-#include "services/shell/public/cpp/interface_registry.h"
 #include "services/shell/runner/common/switches.h"
 #include "storage/browser/fileapi/sandbox_file_system_backend.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/display/display_switches.h"
 #include "ui/events/event_switches.h"
 #include "ui/gfx/switches.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/gpu_switching_manager.h"
 #include "ui/native_theme/native_theme_switches.h"
@@ skipping 409 matching lines @@
   // single process modes, the global attachment broker is the privileged
   // attachment broker, rather than an unprivileged attachment broker.
 #if defined(OS_MACOSX)
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded(
       MachBroker::GetInstance());
 #else
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded();
 #endif  // defined(OS_MACOSX)
 #endif  // USE_ATTACHMENT_BROKER
 
-  scoped_refptr<base::SequencedTaskRunner> io_task_runner =
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
   shell::Connector* connector =
       BrowserContext::GetShellConnectorFor(browser_context_);
   // Some embedders may not initialize Mojo or the shell connector for a browser
   // context (e.g. Android WebView)... so just fall back to the per-process
   // connector.
   if (!connector) {
     // Additionally, some test code may not initialize the process-wide
     // MojoShellConnection prior to this point. This class of test code doesn't
     // care about render processes so we can initialize a dummy one.
     if (!MojoShellConnection::GetForProcess()) {
       shell::mojom::ServiceRequest request = mojo::GetProxy(&test_service_);
       MojoShellConnection::SetForProcess(MojoShellConnection::Create(
-          std::move(request), io_task_runner));
+          std::move(request)));
     }
     connector = MojoShellConnection::GetForProcess()->GetConnector();
   }
   mojo_child_connection_.reset(new MojoChildConnection(
       kRendererMojoApplicationName,
-      base::StringPrintf("%d_%d", id_, instance_id_++), child_token_, connector,
-      io_task_runner));
+      base::StringPrintf("%d_%d", id_, instance_id_++),
+      child_token_,
+      connector));
 }
 
 // static
 void RenderProcessHostImpl::ShutDownInProcessRenderer() {
   DCHECK(g_run_renderer_in_process_);
 
   switch (g_all_hosts.Pointer()->size()) {
     case 0:
       return;
     case 1: {
@@ skipping 104 matching lines @@
     DCHECK(g_renderer_main_thread_factory);
     // Crank up a thread and run the initialization there.  With the way that
     // messages flow between the browser and renderer, this thread is required
     // to prevent a deadlock in single-process mode.  Since the primordial
     // thread in the renderer process runs the WebKit code and can sometimes
     // make blocking calls to the UI thread (i.e. this thread), they need to run
     // on separate threads.
     in_process_renderer_.reset(
         g_renderer_main_thread_factory(InProcessChildThreadParams(
             channel_id,
-            BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
+            BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::IO)
+                ->task_runner(),
             mojo_channel_token_,
             mojo_child_connection_->service_token())));
 
     base::Thread::Options options;
 #if defined(OS_WIN) && !defined(OS_MACOSX)
     // In-process plugins require this to be a UI message loop.
     options.message_loop_type = base::MessageLoop::TYPE_UI;
 #else
     // We can't have multiple UI loops on Linux and Android, so we don't support
     // in-process plugins.
@@ skipping 338 matching lines @@
 void RenderProcessHostImpl::ResumeDeferredNavigation(
     const GlobalRequestID& request_id) {
   widget_helper_->ResumeDeferredNavigation(request_id);
 }
 
 void RenderProcessHostImpl::NotifyTimezoneChange(const std::string& zone_id) {
   Send(new ViewMsg_TimezoneChange(zone_id));
 }
 
 shell::InterfaceRegistry* RenderProcessHostImpl::GetInterfaceRegistry() {
-  return mojo_child_connection_->GetInterfaceRegistry();
+  return GetChildConnection()->GetInterfaceRegistry();
 }
 
 shell::InterfaceProvider* RenderProcessHostImpl::GetRemoteInterfaces() {
-  return mojo_child_connection_->GetRemoteInterfaces();
+  return GetChildConnection()->GetRemoteInterfaces();
+}
+
+shell::Connection* RenderProcessHostImpl::GetChildConnection() {
+  DCHECK(mojo_child_connection_);
+  return mojo_child_connection_->connection();
 }
 
 std::unique_ptr<base::SharedPersistentMemoryAllocator>
 RenderProcessHostImpl::TakeMetricsAllocator() {
   return std::move(metrics_allocator_);
 }
 
 const base::TimeTicks& RenderProcessHostImpl::GetInitTimeForNavigationMetrics()
     const {
   return init_time_;
@@ skipping 1298 matching lines @@
   // RenderProcessExited observers and RenderProcessGone handlers might
   // navigate or perform other actions that require a connection. Ensure that
   // there is one before calling them.
   child_token_ = mojo::edk::GenerateRandomToken();
   shell::Connector* connector =
       BrowserContext::GetShellConnectorFor(browser_context_);
   if (!connector)
     connector = MojoShellConnection::GetForProcess()->GetConnector();
   mojo_child_connection_.reset(new MojoChildConnection(
       kRendererMojoApplicationName,
-      base::StringPrintf("%d_%d", id_, instance_id_++), child_token_, connector,
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)));
+      base::StringPrintf("%d_%d", id_, instance_id_++),
+      child_token_,
+      connector));
 
   within_process_died_observer_ = true;
   NotificationService::current()->Notify(
       NOTIFICATION_RENDERER_PROCESS_CLOSED, Source<RenderProcessHost>(this),
       Details<RendererClosedDetails>(&details));
   FOR_EACH_OBSERVER(RenderProcessHostObserver, observers_,
                     RenderProcessExited(this, status, exit_code));
   within_process_died_observer_ = false;
 
   message_port_message_filter_ = NULL;
@@ skipping 383 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(process.get(),
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content