[Extensions] Short-circuit activity logging if not enabled

extensions/browser/test_extensions_browser_client.cc

 // Copyright 2014 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/test_extensions_browser_client.h"
 
 #include "base/values.h"
 #include "build/build_config.h"
 #include "content/public/browser/browser_context.h"
 #include "extensions/browser/extension_host_delegate.h"
@@ skipping 134 matching lines @@
 
 void TestExtensionsBrowserClient::PermitExternalProtocolHandler() {
 }
 
 bool TestExtensionsBrowserClient::IsRunningInForcedAppMode() { return false; }
 
 bool TestExtensionsBrowserClient::IsLoggedInAsPublicAccount() {
   return false;
 }
 
-ApiActivityMonitor* TestExtensionsBrowserClient::GetApiActivityMonitor(
-    BrowserContext* context) {
-  return NULL;
-}
-
 ExtensionSystemProvider*
 TestExtensionsBrowserClient::GetExtensionSystemFactory() {
   DCHECK(extension_system_factory_);
   return extension_system_factory_;
 }
 
 void TestExtensionsBrowserClient::RegisterExtensionFunctions(
     ExtensionFunctionRegistry* registry) const {}
 
 void TestExtensionsBrowserClient::RegisterMojoServices(
@@ skipping 42 matching lines @@
 
 scoped_refptr<update_client::UpdateClient>
 TestExtensionsBrowserClient::CreateUpdateClient(
     content::BrowserContext* context) {
   return update_client_factory_.is_null()
              ? nullptr
              : make_scoped_refptr(update_client_factory_.Run());
 }
 
 }  // namespace extensions