Add ApiActivityMonitor to decouple ActivityLog from low-level extensions code

chrome/browser/extensions/activity_log/counting_policy_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 "base/cancelable_callback.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
@@ skipping 12 matching lines @@
 #include "extensions/common/extension_builder.h"
 #include "sql/statement.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #endif
 
+using content::BrowserThread;
+
 namespace extensions {
 
 class CountingPolicyTest : public testing::Test {
  public:
   CountingPolicyTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
         saved_cmdline_(CommandLine::NO_PROGRAM) {
 #if defined OS_CHROMEOS
     test_user_manager_.reset(new chromeos::ScopedTestUserManager());
 #endif
@@ skipping 12 matching lines @@
     test_user_manager_.reset();
 #endif
     base::RunLoop().RunUntilIdle();
     profile_.reset(NULL);
     base::RunLoop().RunUntilIdle();
     // Restore the original command line and undo the affects of SetUp().
     *CommandLine::ForCurrentProcess() = saved_cmdline_;
   }
 
   // Wait for the task queue for the specified thread to empty.
-  void WaitOnThread(const content::BrowserThread::ID& thread) {
+  void WaitOnThread(const BrowserThread::ID& thread) {
     BrowserThread::PostTaskAndReply(
         thread,
         FROM_HERE,
         base::Bind(&base::DoNothing),
         base::MessageLoop::current()->QuitClosure());
     base::MessageLoop::current()->Run();
   }
 
   // A wrapper function for CheckReadFilteredData, so that we don't need to
   // enter empty string values for parameters we don't care about.
@@ skipping 1032 matching lines @@
 
   CheckReadData(
       policy,
       "punky",
       0,
       base::Bind(&CountingPolicyTest::CheckDuplicates));
   policy->Close();
 }
 
 }  // namespace extensions