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

extensions/browser/renderer_startup_helper.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/renderer_startup_helper.h"
 
 #include "base/values.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
@@ skipping 20 matching lines @@
 
 RendererStartupHelper::~RendererStartupHelper() {}
 
 void RendererStartupHelper::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(content::NOTIFICATION_RENDERER_PROCESS_CREATED, type);
   content::RenderProcessHost* process =
       content::Source<content::RenderProcessHost>(source).ptr();
-  if (!ExtensionsBrowserClient::Get()->IsSameContext(
-          browser_context_, process->GetBrowserContext()))
+  ExtensionsBrowserClient* client = ExtensionsBrowserClient::Get();
+  if (!client->IsSameContext(browser_context_, process->GetBrowserContext()))
     return;
 
+  bool activity_logging_enabled =
+      client->IsActivityLoggingEnabled(process->GetBrowserContext());
+  // We only send the ActivityLoggingEnabled message if it is enabled; otherwise
+  // the default (not enabled) is correct.
+  if (activity_logging_enabled) {
+    process->Send(
+        new ExtensionMsg_SetActivityLoggingEnabled(activity_logging_enabled));
+  }
+
   // Platform apps need to know the system font.
   // TODO(dbeam): this is not the system font in all cases.
   process->Send(new ExtensionMsg_SetSystemFont(webui::GetFontFamily(),
                                                webui::GetFontSize()));
 
   // Scripting whitelist. This is modified by tests and must be communicated
   // to renderers.
   process->Send(new ExtensionMsg_SetScriptingWhitelist(
       extensions::ExtensionsClient::Get()->GetScriptingWhitelist()));
 
@@ skipping 56 matching lines @@
     BrowserContext* context) const {
   // Redirected in incognito.
   return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
 }
 
 bool RendererStartupHelperFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 }  // namespace extensions