<webview>: Change how plugin load works inside guests.

chrome/browser/guestview/webview/plugin_permission_helper.cc

+// Copyright (c) 2013 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/guestview/webview/plugin_permission_helper.h"
+
+#include "chrome/browser/guestview/webview/webview_guest.h"
+#include "chrome/browser/guestview/webview/webview_permission_types.h"
+#include "chrome/browser/plugins/chrome_plugin_service_filter.h"
+#include "chrome/common/render_messages.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+
+using content::RenderViewHost;
+using content::WebContents;
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(PluginPermissionHelper);
+
+PluginPermissionHelper::PluginPermissionHelper(WebContents* contents)
+    : content::WebContentsObserver(contents),
+      weak_factory_(this) {
+}
+
+PluginPermissionHelper::~PluginPermissionHelper() {
+}
+
+bool PluginPermissionHelper::OnMessageReceived(const IPC::Message& message) {
+  IPC_BEGIN_MESSAGE_MAP(PluginPermissionHelper, message)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_BlockedUnauthorizedPlugin,
+                        OnBlockedUnauthorizedPlugin)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CouldNotLoadPlugin,
+                        OnCouldNotLoadPlugin)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_BlockedOutdatedPlugin,
+                        OnBlockedOutdatedPlugin)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_NPAPINotSupported,
+                        OnNPAPINotSupported)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_OpenAboutPlugins,
+                        OnOpenAboutPlugins)
+#if defined(ENABLE_PLUGIN_INSTALLATION)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_FindMissingPlugin,
+                        OnFindMissingPlugin)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_RemovePluginPlaceholderHost,
+                        OnRemovePluginPlaceholderHost)
+#endif
+    IPC_MESSAGE_UNHANDLED(return false)
+  IPC_END_MESSAGE_MAP()
+
+  return true;
+}
+
+void PluginPermissionHelper::OnBlockedUnauthorizedPlugin(
+    const string16& name,
+    const std::string& identifier) {
+  const char kPluginName[] = "name";
+  const char kPluginIdentifier[] = "identifier";
+
+  WebViewGuest* webview = WebViewGuest::FromWebContents(web_contents());
+  if (!webview)
+    return;
+
+  base::DictionaryValue info;

[Fady Samuel, 2013/09/27 13:04:08]

It would be nice to have an UMA count here. WebView.Guest.PluginLoad? That'll
give us a sense for just how frequently we load plugins in <webview>.

[sadrul, 2013/09/27 14:17:39]

Done.

+  info.SetString(std::string(kPluginName), name);
+  info.SetString(std::string(kPluginIdentifier), identifier);
+  webview->RequestPermission(static_cast<BrowserPluginPermissionType>(
+          WEB_VIEW_PERMISSION_TYPE_LOAD_PLUGIN),
+      info,
+      base::Bind(&PluginPermissionHelper::OnPermissionResponse,
+                 weak_factory_.GetWeakPtr(),
+                 identifier));
+}
+
+void PluginPermissionHelper::OnCouldNotLoadPlugin(
+    const base::FilePath& plugin_path) {
+}
+
+void PluginPermissionHelper::OnBlockedOutdatedPlugin(
+    int placeholder_id,
+    const std::string& identifier) {
+}
+
+void PluginPermissionHelper::OnNPAPINotSupported(const std::string& id) {
+}
+
+void PluginPermissionHelper::OnOpenAboutPlugins() {
+}
+
+#if defined(ENABLE_PLUGIN_INSTALLATION)
+void PluginPermissionHelper::OnFindMissingPlugin(int placeholder_id,
+                                                 const std::string& mime_type) {
+}
+
+void PluginPermissionHelper::OnRemovePluginPlaceholderHost(int placeholder_id) {
+}
+#endif // defined(ENABLE_PLUGIN_INSTALLATION)
+
+void PluginPermissionHelper::OnPermissionResponse(const std::string& identifier,
+                                                  bool allow,
+                                                  const std::string& input) {
+  if (allow) {
+    RenderViewHost* host = web_contents()->GetRenderViewHost();
+    ChromePluginServiceFilter::GetInstance()->AuthorizeAllPlugins(
+        host->GetProcess()->GetID());
+    host->Send(new ChromeViewMsg_LoadBlockedPlugins(
+        host->GetRoutingID(), identifier));
+  }
+}