Plugin Power Saver: Enable JS access to throttled plugins.

components/plugins/renderer/loadable_plugin_placeholder.cc

 // Copyright 2015 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 "components/plugins/renderer/loadable_plugin_placeholder.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/json/string_escape.h"
 #include "base/strings/string_piece.h"
@@ skipping 229 matching lines @@
     }
 
     // Prevent processing subsequent calls to MarkPluginEssential.
     power_saver_enabled_ = false;
   }
 #endif
 
   PluginPlaceholder::PluginDestroyed();
 }
 
+v8::Local<v8::Object> LoadablePluginPlaceholder::GetV8ScriptableObject(
+    v8::Isolate* isolate) const {
+#if defined(ENABLE_PLUGINS)
+  // Pass through JavaScript access to the underlying throttled plugin.
+  if (premade_throttler_ && premade_throttler_->GetWebPlugin()) {
+    return premade_throttler_->GetWebPlugin()->v8ScriptableObject(isolate);
+  }
+#endif
+  return v8::Local<v8::Object>();
+}
+
 void LoadablePluginPlaceholder::WasShown() {
   if (is_blocked_for_background_tab_) {
     is_blocked_for_background_tab_ = false;
     if (!LoadingBlocked())
       LoadPlugin();
   }
 }
 
 void LoadablePluginPlaceholder::OnLoadBlockedPlugins(
     const std::string& identifier) {
@@ skipping 79 matching lines @@
   return identifier_;
 }
 
 bool LoadablePluginPlaceholder::LoadingBlocked() const {
   DCHECK(allow_loading_);
   return is_blocked_for_background_tab_ || is_blocked_for_power_saver_poster_ ||
          is_blocked_for_prerendering_;
 }
 
 }  // namespace plugins