Move small c/b/extensions classes into extensions namespace no.1

chrome/browser/extensions/extension_activity_log.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/browser/extensions/extension_activity_log.h"
-
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/extensions/extension.h"
-
-ExtensionActivityLog::ExtensionActivityLog() {
-  log_activity_to_stdout_ = CommandLine::ForCurrentProcess()->
-      HasSwitch(switches::kEnableExtensionActivityLogging);
-}
-
-ExtensionActivityLog::~ExtensionActivityLog() {
-}
-
-// static
-ExtensionActivityLog* ExtensionActivityLog::GetInstance() {
-  return Singleton<ExtensionActivityLog>::get();
-}
-
-void ExtensionActivityLog::AddObserver(
-    const extensions::Extension* extension,
-    ExtensionActivityLog::Observer* observer) {
-  base::AutoLock scoped_lock(lock_);
-
-  if (observers_.count(extension) == 0) {
-    observers_[extension] = new ObserverListThreadSafe<Observer>;
-  }
-
-  observers_[extension]->AddObserver(observer);
-}
-
-void ExtensionActivityLog::RemoveObserver(
-    const extensions::Extension* extension,
-    ExtensionActivityLog::Observer* observer) {
-  base::AutoLock scoped_lock(lock_);
-
-  if (observers_.count(extension) == 1) {
-    observers_[extension]->RemoveObserver(observer);
-  }
-}
-// Extension*
-bool ExtensionActivityLog::HasObservers(
-    const extensions::Extension* extension) const {
-  base::AutoLock scoped_lock(lock_);
-
-  // We also return true if extension activity logging is enabled since in that
-  // case this class is observing all extensions.
-  return observers_.count(extension) > 0 || log_activity_to_stdout_;
-}
-
-void ExtensionActivityLog::Log(const extensions::Extension* extension,
-                               Activity activity,
-                               const std::string& msg) const {
-  base::AutoLock scoped_lock(lock_);
-
-  ObserverMap::const_iterator iter = observers_.find(extension);
-  if (iter != observers_.end()) {
-    iter->second->Notify(&Observer::OnExtensionActivity, extension, activity,
-                         msg);
-  }
-
-  if (log_activity_to_stdout_) {
-    LOG(INFO) << extension->id() + ":" + ActivityToString(activity) + ":" + msg;
-  }
-}
-
-// static
-const char* ExtensionActivityLog::ActivityToString(Activity activity) {
-  switch (activity) {
-    case ExtensionActivityLog::ACTIVITY_EXTENSION_API_CALL:
-      return "api_call";
-    case ExtensionActivityLog::ACTIVITY_EXTENSION_API_BLOCK:
-      return "api_block";
-    default:
-      NOTREACHED();
-      return "";
-  }
-}