Initialize blink only when needed in utility processes.

content/utility/utility_thread_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/utility/utility_thread_impl.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 37 matching lines @@
                           .Build()) {
   Init();
 }
 
 UtilityThreadImpl::~UtilityThreadImpl() {
 }
 
 void UtilityThreadImpl::Shutdown() {
   ChildThreadImpl::Shutdown();
 
-  if (!IsInBrowserProcess())
-    blink::shutdown();
+  if (blink_platform_impl_)
+    blink::shutdownWithoutV8();
 }
 
 void UtilityThreadImpl::ReleaseProcessIfNeeded() {
   if (batch_mode_)
     return;
 
   if (IsInBrowserProcess()) {
     // Close the channel to cause UtilityProcessHostImpl to be deleted. We need
     // to take a different code path than the multi-process case because that
     // depends on the child process going away to close the channel, but that
     // can't happen when we're in single process mode.
     channel()->Close();
   } else {
     ChildProcess::current()->ReleaseProcess();
   }
 }
 
+void UtilityThreadImpl::EnsureBlinkInitialized() {
+  if (blink_platform_impl_ || IsInBrowserProcess()) {
+    // We can only initialize WebKit on one thread, and in single process mode
+    // we run the utility thread on separate thread. This means that if any code
+    // needs WebKit initialized in the utility process, they need to have
+    // another path to support single process mode.
+    return;
+  }
+
+  blink_platform_impl_.reset(new UtilityBlinkPlatformImpl);
+  blink::initializeWithoutV8(blink_platform_impl_.get());
+}
+
 void UtilityThreadImpl::Init() {
   batch_mode_ = false;
   ChildProcess::current()->AddRefProcess();
-  if (!IsInBrowserProcess()) {
-    // We can only initialize WebKit on one thread, and in single process mode
-    // we run the utility thread on separate thread. This means that if any code
-    // needs WebKit initialized in the utility process, they need to have
-    // another path to support single process mode.
-    blink_platform_impl_.reset(new UtilityBlinkPlatformImpl);
-    blink::initialize(blink_platform_impl_.get());
-  }
   GetContentClient()->utility()->UtilityThreadStarted();
 
   process_control_.reset(new UtilityProcessControlImpl);
   service_registry()->AddService(base::Bind(
       &UtilityThreadImpl::BindProcessControlRequest, base::Unretained(this)));
 
   GetContentClient()->utility()->RegisterMojoServices(service_registry());
 }
 
 bool UtilityThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
@@ skipping 43 matching lines @@
 }
 #endif
 
 void UtilityThreadImpl::BindProcessControlRequest(
     mojo::InterfaceRequest<ProcessControl> request) {
   DCHECK(process_control_);
   process_control_bindings_.AddBinding(process_control_.get(), request.Pass());
 }
 
 }  // namespace content