Don't keep the lazy background page alive after a view with a Pepper plugin is closed

extensions/browser/extension_web_contents_observer.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/extension_web_contents_observer.h"
 
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/url_constants.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/mojo/service_registration.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
+#include "extensions/common/view_type.h"
 
 namespace extensions {
 
 // static
 ExtensionWebContentsObserver* ExtensionWebContentsObserver::GetForWebContents(
     content::WebContents* web_contents) {
   return ExtensionsBrowserClient::Get()->GetExtensionWebContentsObserver(
       web_contents);
 }
 
@@ skipping 82 matching lines @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(
       ExtensionWebContentsObserver, message, render_frame_host)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ExtensionWebContentsObserver::PepperInstanceCreated() {
-  ProcessManager* const process_manager = ProcessManager::Get(browser_context_);
-  const Extension* const extension =
-      process_manager->GetExtensionForWebContents(web_contents());
-  if (extension)
-    process_manager->IncrementLazyKeepaliveCount(extension);
+  if (GetViewType(web_contents()) == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE) {
+    ProcessManager* const process_manager =
+        ProcessManager::Get(browser_context_);
+    const Extension* const extension =
+        process_manager->GetExtensionForWebContents(web_contents());
+    if (extension)
+      process_manager->IncrementLazyKeepaliveCount(extension);
+  }
 }
 
 void ExtensionWebContentsObserver::PepperInstanceDeleted() {
-  ProcessManager* const process_manager = ProcessManager::Get(browser_context_);
-  const Extension* const extension =
-      process_manager->GetExtensionForWebContents(web_contents());
-  if (extension)
-    process_manager->DecrementLazyKeepaliveCount(extension);
+  if (GetViewType(web_contents()) == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE) {
+    ProcessManager* const process_manager =
+        ProcessManager::Get(browser_context_);
+    const Extension* const extension =
+        process_manager->GetExtensionForWebContents(web_contents());
+    if (extension)
+      process_manager->DecrementLazyKeepaliveCount(extension);
+  }
 }
 
 std::string ExtensionWebContentsObserver::GetExtensionIdFromFrame(
     content::RenderFrameHost* render_frame_host) const {
   content::SiteInstance* site_instance = render_frame_host->GetSiteInstance();
   GURL url = render_frame_host->GetLastCommittedURL();
   if (!url.is_empty()) {
     if (site_instance->GetSiteURL().GetOrigin() != url.GetOrigin())
       return std::string();
   } else {
@@ skipping 48 matching lines @@
   // Since this is called for all existing RenderFrameHosts during the
   // ExtensionWebContentsObserver's creation, it's possible that not all hosts
   // are ready.
   // We only initialize the frame if the renderer counterpart is live; otherwise
   // we wait for the RenderFrameCreated notification.
   if (render_frame_host->IsRenderFrameLive())
     InitializeRenderFrame(render_frame_host);
 }
 
 }  // namespace extensions