Fix a crash in PageActionImageView when extensions are reloaded due to incognito settings changing.

chrome/test/base/testing_profile.cc

 // Copyright (c) 2011 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 "chrome/test/base/testing_profile.h"
 
 #include "build/build_config.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 327 matching lines @@
 
 static ProfileKeyedService* BuildTemplateURLService(Profile* profile) {
   return new TemplateURLService(profile);
 }
 
 void TestingProfile::CreateTemplateURLService() {
   TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
       this, BuildTemplateURLService);
 }
 
+void TestingProfile::CreateExtensionProcessManager() {
+  extension_process_manager_.reset(ExtensionProcessManager::Create(this));
+}
+
 ExtensionService* TestingProfile::CreateExtensionService(
     const CommandLine* command_line,
     const FilePath& install_directory,
     bool autoupdate_enabled) {
   // Extension pref store, created for use by |extension_prefs_|.
 
   extension_pref_value_map_.reset(new ExtensionPrefValueMap);
 
   bool extensions_disabled =
       command_line && command_line->HasSwitch(switches::kDisableExtensions);
@@ skipping 83 matching lines @@
 
 UserScriptMaster* TestingProfile::GetUserScriptMaster() {
   return NULL;
 }
 
 ExtensionDevToolsManager* TestingProfile::GetExtensionDevToolsManager() {
   return NULL;
 }
 
 ExtensionProcessManager* TestingProfile::GetExtensionProcessManager() {
-  return NULL;
+  return extension_process_manager_.get();
 }
 
 ExtensionMessageService* TestingProfile::GetExtensionMessageService() {
   return NULL;
 }
 
 ExtensionEventRouter* TestingProfile::GetExtensionEventRouter() {
   return NULL;
 }
 
@@ skipping 339 matching lines @@
 quota::SpecialStoragePolicy* TestingProfile::GetSpecialStoragePolicy() {
   return GetExtensionSpecialStoragePolicy();
 }
 
 void TestingProfile::DestroyWebDataService() {
   if (!web_data_service_.get())
     return;
 
   web_data_service_->Shutdown();
 }