Keep event page alive when there's some Pepper plugin on it.

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 519 matching lines @@
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateZoomLimits, OnUpdateZoomLimits)
     IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RegisterProtocolHandler,
                         OnRegisterProtocolHandler)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UnregisterProtocolHandler,
                         OnUnregisterProtocolHandler)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AppCacheAccessed, OnAppCacheAccessed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
 #if defined(ENABLE_PLUGINS)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_PepperInstanceCreated,
+                        OnPepperInstanceCreated)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_PepperInstanceDeleted,
+                        OnPepperInstanceDeleted)
     IPC_MESSAGE_HANDLER(FrameHostMsg_PepperPluginHung, OnPepperPluginHung)
     IPC_MESSAGE_HANDLER(FrameHostMsg_PluginCrashed, OnPluginCrashed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestPpapiBrokerPermission,
                         OnRequestPpapiBrokerPermission)
     IPC_MESSAGE_HANDLER_GENERIC(BrowserPluginHostMsg_Attach,
                                 OnBrowserPluginMessage(render_frame_host,
                                                        message))
 #endif
     IPC_MESSAGE_HANDLER(ImageHostMsg_DidDownloadImage, OnDidDownloadImage)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateFaviconURL, OnUpdateFaviconURL)
@@ skipping 2455 matching lines @@
 // This exists for render views that don't have a WebUI, but do have WebUI
 // bindings enabled.
 void WebContentsImpl::OnWebUISend(const GURL& source_url,
                                   const std::string& name,
                                   const base::ListValue& args) {
   if (delegate_)
     delegate_->WebUISend(this, source_url, name, args);
 }
 
 #if defined(ENABLE_PLUGINS)
+void WebContentsImpl::OnPepperInstanceCreated() {
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_, PepperInstanceCreated());
+}
+
+void WebContentsImpl::OnPepperInstanceDeleted() {
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_, PepperInstanceDeleted());
+}
+
 void WebContentsImpl::OnPepperPluginHung(int plugin_child_id,
                                          const base::FilePath& path,
                                          bool is_hung) {
   UMA_HISTOGRAM_COUNTS("Pepper.PluginHung", 1);
 
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     PluginHungStatusChanged(plugin_child_id, path, is_hung));
 }
 
 void WebContentsImpl::OnPluginCrashed(const base::FilePath& plugin_path,
@@ skipping 1407 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content