Ensure streams aren't intercepted unless their associated plugin is enabled

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

 // Copyright (c) 2012 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/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 #include <vector>
 
 #include "base/base64.h"
 #include "base/guid.h"
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/component_updater/component_updater_resource_throttle.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
 #include "chrome/browser/net/resource_prefetch_predictor_observer.h"
+#include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/prefetch/prefetch.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/prerender/prerender_resource_throttle.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/prerender/prerender_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/browser/renderer_host/safe_browsing_resource_throttle_factory.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/signin/signin_header_helper.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/variations/net/variations_http_header_provider.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/plugin_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/resource_dispatcher_host.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/service_worker_context.h"
 #include "content/public/browser/stream_info.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/resource_response.h"
 #include "net/base/load_flags.h"
@@ skipping 150 matching lines @@
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
 
   StreamsPrivateAPI* streams_private = StreamsPrivateAPI::Get(profile);
   if (!streams_private)
     return;
   streams_private->ExecuteMimeTypeHandler(
       extension_id, web_contents, stream.Pass(), view_id, expected_content_size,
       embedded, render_process_id, render_frame_id);
 }
+
+bool IsPluginEnabledForExtension(const Extension* extension,
+                                 int render_process_id,
+                                 int render_view_id) {
+  content::WebPluginInfo plugin_info;
+  base::FilePath plugin_path =
+      base::FilePath::FromUTF8Unsafe(extension->url().spec());
+  if (!content::PluginService::GetInstance()->GetPluginInfoByPath(
+          plugin_path, &plugin_info)) {
+    return false;
+  }
+
+  content::WebContents* web_contents =
+      tab_util::GetWebContentsByID(render_process_id, render_view_id);
+  if (!web_contents)
+    return false;
+
+  content::BrowserContext* browser_context = web_contents->GetBrowserContext();
+  if (!browser_context)
+    return false;
+
+  if (!PluginPrefs::GetForProfile(Profile::FromBrowserContext(

[Lei Zhang, 2015/02/18 04:24:18]

You can just return the IsPluginEnabled() result here.

[raymes, 2015/02/18 21:24:27]

Done.

+          browser_context))->IsPluginEnabled(plugin_info)) {
+    return false;
+  }
+
+  return true;
+}
 #endif  // !defined(ENABLE_EXTENSIONS)
 
 #if !defined(OS_ANDROID)
 void LaunchURL(const GURL& url, int render_process_id, int render_view_id) {
   // If there is no longer a WebContents, the request may have raced with tab
   // closing. Don't fire the external request. (It may have been a prerender.)
   content::WebContents* web_contents =
       tab_util::GetWebContentsByID(render_process_id, render_view_id);
   if (!web_contents)
     return;
@@ skipping 394 matching lines @@
     const Extension* extension =
         extension_info_map->extensions().GetByID(extension_id);
     // The white-listed extension may not be installed, so we have to NULL check
     // |extension|.
     if (!extension ||
         (profile_is_off_the_record &&
          !extension_info_map->IsIncognitoEnabled(extension_id))) {
       continue;
     }
 
+    if (!IsPluginEnabledForExtension(extension,
+                                     info->GetChildID(),
+                                     info->GetRouteID())) {
+      continue;
+    }
+
     MimeTypesHandler* handler = MimeTypesHandler::GetHandler(extension);
     if (handler && handler->CanHandleMIMEType(mime_type)) {
       StreamTargetInfo target_info;
       *origin = Extension::GetBaseURLFromExtensionId(extension_id);
       target_info.extension_id = extension_id;
       if (!handler->handler_url().empty()) {
         target_info.view_id = base::GenerateGUID();
         *payload = target_info.view_id;
       }
       stream_target_info_[request] = target_info;
@@ skipping 133 matching lines @@
                                        url_request->GetTotalReceivedBytes()));
   }
 }
 
 // static
 void ChromeResourceDispatcherHostDelegate::
     SetExternalProtocolHandlerDelegateForTesting(
     ExternalProtocolHandler::Delegate* delegate) {
   g_external_protocol_handler_delegate = delegate;
 }