Reland: Refactor code that defers extension background page loading

extensions/browser/lazy_background_task_queue_unittest.cc

 // Copyright 2013 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/browser/lazy_background_task_queue.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_service_test_base.h"
 #include "chrome/browser/extensions/test_extension_system.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/browser/extension_registry.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_builder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
 // A ProcessManager that doesn't create background host pages.
 class TestProcessManager : public ProcessManager {
  public:
   explicit TestProcessManager(Profile* profile)
-      : ProcessManager(profile, profile->GetOriginalProfile()),
+      : ProcessManager(profile,
+                       profile->GetOriginalProfile(),
+                       ExtensionRegistry::Get(profile)),

[Yoyo Zhou, 2014/07/21 22:34:51]

I was a bit taken aback here, but I see this test uses TestingProfile.

         create_count_(0) {}
   virtual ~TestProcessManager() {}
 
   int create_count() { return create_count_; }
 
   // ProcessManager overrides:
   virtual bool CreateBackgroundHost(const Extension* extension,
                                     const GURL& url) OVERRIDE {
     // Don't actually try to create a web contents.
     create_count_++;
@@ skipping 150 matching lines @@
   EXPECT_EQ(1u, queue.extensions_with_pending_tasks());
 
   // Processing tasks when there is one pending runs the task and removes the
   // extension from the list of extensions with pending tasks.
   queue.ProcessPendingTasks(NULL, profile_.get(), extension);
   EXPECT_EQ(1, task_run_count());
   EXPECT_EQ(0u, queue.extensions_with_pending_tasks());
 }
 
 }  // namespace extensions