Initialize blink only when needed in utility processes.

extensions/utility/utility_handler.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 "extensions/utility/utility_handler.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/i18n/rtl.h"
@@ skipping 81 matching lines @@
 }
 
 void UtilityHandler::OnUnpackExtension(
     const base::FilePath& extension_path,
     const std::string& extension_id,
     int location,
     int creation_flags) {
   CHECK_GT(location, Manifest::INVALID_LOCATION);
   CHECK_LT(location, Manifest::NUM_LOCATIONS);
   DCHECK(ExtensionsClient::Get());
+  content::UtilityThread::Get()->EnsureBlinkInitialized();
   base::FilePath working_dir = extension_path.DirName();
   base::FilePath unzipped_dir = working_dir.AppendASCII(kTempExtensionName);
   base::string16 error;
   if (!base::CreateDirectory(unzipped_dir)) {
     Send(new ExtensionUtilityHostMsg_UnpackExtension_Failed(
         l10n_util::GetStringFUTF16(
             IDS_EXTENSION_PACKAGE_DIRECTORY_ERROR,
             base::i18n::GetDisplayStringInLTRDirectionality(
                 unzipped_dir.LossyDisplayName()))));
   } else if (!zip::Unzip(extension_path, unzipped_dir)) {
     Send(new ExtensionUtilityHostMsg_UnpackExtension_Failed(
         l10n_util::GetStringUTF16(IDS_EXTENSION_PACKAGE_UNZIP_ERROR)));
   } else {
     Unpacker unpacker(working_dir, unzipped_dir, extension_id,
                       static_cast<Manifest::Location>(location),
                         creation_flags);
     if (unpacker.Run()) {
       Send(new ExtensionUtilityHostMsg_UnpackExtension_Succeeded(
           *unpacker.parsed_manifest()));
     } else {
       Send(new ExtensionUtilityHostMsg_UnpackExtension_Failed(
           unpacker.error_message()));
     }
   }
   ReleaseProcessIfNeeded();
 }
 
 
 }  // namespace extensions