Plugin Power Saver: Implement size-based heuristic for peripheral content.

content/renderer/pepper/pepper_plugin_instance_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/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_offset_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "cc/base/latency_info_swap_promise.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/layers/texture_layer.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/common/content_constants_internal.h"
+#include "content/common/frame_messages.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/gpu/render_widget_compositor.h"
 #include "content/renderer/pepper/content_decryptor_delegate.h"
 #include "content/renderer/pepper/event_conversion.h"
 #include "content/renderer/pepper/fullscreen_container.h"
 #include "content/renderer/pepper/gfx_conversion.h"
 #include "content/renderer/pepper/host_dispatcher_wrapper.h"
 #include "content/renderer/pepper/host_globals.h"
 #include "content/renderer/pepper/message_channel.h"
 #include "content/renderer/pepper/pepper_browser_connection.h"
 #include "content/renderer/pepper/pepper_compositor_host.h"
 #include "content/renderer/pepper/pepper_file_ref_renderer_host.h"
 #include "content/renderer/pepper/pepper_graphics_2d_host.h"
 #include "content/renderer/pepper/pepper_in_process_router.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/pepper_plugin_instance_throttler.h"
 #include "content/renderer/pepper/pepper_try_catch.h"
 #include "content/renderer/pepper/pepper_url_loader_host.h"
 #include "content/renderer/pepper/plugin_module.h"
 #include "content/renderer/pepper/plugin_object.h"
+#include "content/renderer/pepper/plugin_power_saver_helper.h"
 #include "content/renderer/pepper/ppapi_preferences_builder.h"
 #include "content/renderer/pepper/ppb_buffer_impl.h"
 #include "content/renderer/pepper/ppb_graphics_3d_impl.h"
 #include "content/renderer/pepper/ppb_image_data_impl.h"
 #include "content/renderer/pepper/renderer_ppapi_host_impl.h"
 #include "content/renderer/pepper/url_request_info_util.h"
 #include "content/renderer/pepper/url_response_info_util.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
@@ skipping 509 matching lines @@
 
     if (!module_->IsProxied()) {
       PepperBrowserConnection* browser_connection =
           PepperBrowserConnection::Get(render_frame_);
       browser_connection->DidCreateInProcessInstance(
           pp_instance(),
           render_frame_->GetRoutingID(),
           container_->element().document().url(),
           GetPluginURL());
     }
+
+    PluginPowerSaverHelper* power_saver_helper =
+        render_frame_->plugin_power_saver_helper();
+    GURL content_origin = plugin_url_.GetOrigin();
+    blink::WebRect bounds = container_->element().boundsInViewportSpace();
+
+    bool cross_origin = false;
+    power_saver_enabled_ =
+        CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kEnablePluginPowerSaver) &&
+        module_->name() == kFlashPluginName &&
+        power_saver_helper->ShouldThrottleContent(
+            content_origin, bounds.width, bounds.height, &cross_origin);
+
+    if (power_saver_enabled_) {
+      power_saver_helper->RegisterPeripheralPlugin(
+          content_origin,
+          base::Bind(&PepperPluginInstanceImpl::DisablePowerSaverAndUnthrottle,
+                     weak_factory_.GetWeakPtr()));
+
+      throttler_.reset(new PepperPluginInstanceThrottler(
+          base::Bind(&PepperPluginInstanceImpl::SetPluginThrottled,
+                     weak_factory_.GetWeakPtr(), true /* throttled */)));
+    } else if (cross_origin) {
+      power_saver_helper->WhitelistContentOrigin(content_origin);
+    }
   }
 
   RendererPpapiHostImpl* host_impl = module_->renderer_ppapi_host();
   resource_creation_ = host_impl->CreateInProcessResourceCreationAPI(this);
 
   if (GetContentClient()->renderer() &&  // NULL in unit tests.
       GetContentClient()->renderer()->IsExternalPepperPlugin(module->name()))
     external_document_load_ = true;
-
-  power_saver_enabled_ = CommandLine::ForCurrentProcess()->HasSwitch(
-                             switches::kEnablePluginPowerSaver) &&
-                         IsPeripheralContent();
-
-  if (power_saver_enabled_) {
-    throttler_.reset(new PepperPluginInstanceThrottler(
-        base::Bind(&PepperPluginInstanceImpl::SetPluginThrottled,
-                   weak_factory_.GetWeakPtr(), true /* throttled */)));
-  }
 }
 
 PepperPluginInstanceImpl::~PepperPluginInstanceImpl() {
   DCHECK(!fullscreen_container_);
 
   // Notify all the plugin objects of deletion. This will prevent blink from
   // calling into the plugin any more.
   //
   // Swap out the set so we can delete from it (the objects will try to
   // unregister themselves inside the delete call).
@@ skipping 2683 matching lines @@
   } else {
     // Running out-of-process. Initiate an IPC call to notify the plugin
     // process.
     ppapi::proxy::HostDispatcher* dispatcher =
         ppapi::proxy::HostDispatcher::GetForInstance(pp_instance());
     dispatcher->Send(new PpapiMsg_PPPInstance_HandleDocumentLoad(
         ppapi::API_ID_PPP_INSTANCE, pp_instance(), pending_host_id, data));
   }
 }
 
-bool PepperPluginInstanceImpl::IsPeripheralContent() const {
-  if (module_->name() != kFlashPluginName)
-    return false;
-
-  // Peripheral plugin content is defined to be peripheral when the plugin
-  // content's origin differs from the top level frame's origin. For example:
-  //  - Peripheral:      a.com -> b.com/plugin.swf
-  //  - Peripheral:      a.com -> b.com/iframe.html -> b.com/plugin.swf
-  //  - NOT peripheral:  a.com -> b.com/iframe-to-a.html -> a.com/plugin.swf
-
-  // TODO(alexmos): Update this to use the origin of the RemoteFrame when 426512
-  // is fixed. For now, case 3 in the comment above doesn't work in
-  // --site-per-process mode.
-  WebFrame* main_frame = render_frame_->GetWebFrame()->view()->mainFrame();
-  if (main_frame->isWebRemoteFrame())
-     return true;
-
-  GURL main_frame_url = main_frame->document().url();
-  return plugin_url_.GetOrigin() != main_frame_url.GetOrigin();
-}
-
 void PepperPluginInstanceImpl::SetPluginThrottled(bool throttled) {
   // Do not throttle if we've already disabled power saver.
   if (!power_saver_enabled_ && throttled)
     return;
 
   plugin_throttled_ = throttled;
   SendDidChangeView();
 }
 
+void PepperPluginInstanceImpl::DisablePowerSaverAndUnthrottle() {
+  DCHECK(power_saver_enabled_);
+  power_saver_enabled_ = false;
+  SetPluginThrottled(false);
+}
+
 }  // namespace content