Initialize blink only when needed in utility processes.

content/utility/utility_thread_impl.cc

Index: content/utility/utility_thread_impl.cc
diff --git a/content/utility/utility_thread_impl.cc b/content/utility/utility_thread_impl.cc
index 00ebc6e6b908b9c63126dd899d618a6f469fd6e0..9e5e33ea574fab8764282a8965cfc305e705a03f 100644
--- a/content/utility/utility_thread_impl.cc
+++ b/content/utility/utility_thread_impl.cc
@@ -55,8 +55,8 @@ UtilityThreadImpl::~UtilityThreadImpl() {
 void UtilityThreadImpl::Shutdown() {
   ChildThreadImpl::Shutdown();
 
-  if (!IsInBrowserProcess())
-    blink::shutdown();
+  if (blink_platform_impl_)
+    blink::shutdownWithoutV8();
 }
 
 void UtilityThreadImpl::ReleaseProcessIfNeeded() {
@@ -74,17 +74,22 @@ void UtilityThreadImpl::ReleaseProcessIfNeeded() {
   }
 }
 
-void UtilityThreadImpl::Init() {
-  batch_mode_ = false;
-  ChildProcess::current()->AddRefProcess();
-  if (!IsInBrowserProcess()) {
+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.
-    blink_platform_impl_.reset(new UtilityBlinkPlatformImpl);
-    blink::initialize(blink_platform_impl_.get());
+    return;
   }
+
+  blink_platform_impl_.reset(new UtilityBlinkPlatformImpl);
+  blink::initializeWithoutV8(blink_platform_impl_.get());
+}
+
+void UtilityThreadImpl::Init() {
+  batch_mode_ = false;
+  ChildProcess::current()->AddRefProcess();
   GetContentClient()->utility()->UtilityThreadStarted();
 
   process_control_.reset(new UtilityProcessControlImpl);