Fix integration tests in src/chrome and src/extensions so that we can turn on IO thread checks wi...

chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
+#include "base/threading/thread_restrictions.h"
 #include "chrome/common/chrome_paths.h"
 #include "extensions/common/extension.h"
 
 using extensions::Extension;
 
 namespace chrome {
 
 scoped_refptr<extensions::Extension> LoadInstallPromptExtension(
     const char* extension_dir_name,
     const char* manifest_file) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   scoped_refptr<Extension> extension;
 
   base::FilePath path;
   PathService::Get(chrome::DIR_TEST_DATA, &path);
   path = path.AppendASCII("extensions")
              .AppendASCII(extension_dir_name)
              .AppendASCII(manifest_file);
 
   std::string error;
   JSONFileValueDeserializer deserializer(path);
@@ skipping 11 matching lines @@
     LOG(ERROR) << error;
 
   return extension;
 }
 
 scoped_refptr<Extension> LoadInstallPromptExtension() {
   return LoadInstallPromptExtension("install_prompt", "extension.json");
 }
 
 gfx::Image LoadInstallPromptIcon() {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::FilePath path;
   PathService::Get(chrome::DIR_TEST_DATA, &path);
   path = path.AppendASCII("extensions")
              .AppendASCII("install_prompt")
              .AppendASCII("icon.png");
 
   std::string file_contents;
   base::ReadFileToString(path, &file_contents);
 
   return gfx::Image::CreateFrom1xPNGBytes(
@@ skipping 15 matching lines @@
 BuildExtensionPostInstallPermissionsPrompt(Extension* extension) {
   std::unique_ptr<ExtensionInstallPrompt::Prompt> prompt(
       new ExtensionInstallPrompt::Prompt(
           ExtensionInstallPrompt::POST_INSTALL_PERMISSIONS_PROMPT));
   prompt->set_extension(extension);
   prompt->set_icon(LoadInstallPromptIcon());
   return prompt;
 }
 
 }  // namespace chrome