[Extensions] Add renderer-side logic to short circuit activity logging

chrome/browser/extensions/chrome_extensions_browser_client.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 "chrome/browser/extensions/chrome_extensions_browser_client.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 393 matching lines @@
 }
 
 std::unique_ptr<content::BluetoothChooser>
 ChromeExtensionsBrowserClient::CreateBluetoothChooser(
     content::RenderFrameHost* frame,
     const content::BluetoothChooser::EventHandler& event_handler) {
   return base::WrapUnique(
       new ChromeExtensionBluetoothChooser(frame, event_handler));
 }
 
+bool ChromeExtensionsBrowserClient::IsActivityLoggingEnabled(
+    content::BrowserContext* context) {
+  ActivityLog* activity_log = ActivityLog::GetInstance(context);
+  return activity_log && activity_log->is_active();
+}
+
 }  // namespace extensions