Plugin Power Saver: Add some UMAs to test plugins in wild.

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"
@@ skipping 477 matching lines @@
     : RenderFrameObserver(render_frame),
       render_frame_(render_frame),
       module_(module),
       instance_interface_(instance_interface),
       pp_instance_(0),
       container_(container),
       layer_bound_to_fullscreen_(false),
       layer_is_hardware_(false),
       plugin_url_(plugin_url),
       power_saver_enabled_(false),
+      is_peripheral_content_(false),
       plugin_throttled_(false),
       full_frame_(false),
       sent_initial_did_change_view_(false),
       bound_graphics_2d_platform_(NULL),
       bound_compositor_(NULL),
       has_webkit_focus_(false),
       has_content_area_focus_(false),
       find_identifier_(-1),
       plugin_find_interface_(NULL),
       plugin_input_event_interface_(NULL),
@@ skipping 341 matching lines @@
     bool full_frame) {
   if (!render_frame_)
     return false;
 
   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) &&
+  is_peripheral_content_ =
       IsFlashPlugin(module_.get()) &&
-      power_saver_helper->ShouldThrottleContent(
-          content_origin, bounds.width, bounds.height, &cross_origin);
+      power_saver_helper->ShouldThrottleContent(content_origin, bounds.width,
+                                                bounds.height, &cross_origin);
 
-  if (power_saver_enabled_) {
+  power_saver_enabled_ = is_peripheral_content_ &&
+                         base::CommandLine::ForCurrentProcess()->HasSwitch(
+                             switches::kEnablePluginPowerSaver);
+
+  if (is_peripheral_content_) {
+    // To collect UMAs, register peripheral content even if we don't throttle.
     power_saver_helper->RegisterPeripheralPlugin(
         content_origin,
-        base::Bind(&PepperPluginInstanceImpl::DisablePowerSaverAndUnthrottle,
-                   weak_factory_.GetWeakPtr()));
+        base::Bind(
+            &PepperPluginInstanceImpl::DisablePowerSaverByRetroactiveWhitelist,
+            weak_factory_.GetWeakPtr()));
 
-    throttler_.reset(new PepperPluginInstanceThrottler(
-        base::Bind(&PepperPluginInstanceImpl::SetPluginThrottled,
-                   weak_factory_.GetWeakPtr(), true /* throttled */)));
+    if (power_saver_enabled_) {
+      throttler_.reset(new PepperPluginInstanceThrottler(
+          base::Bind(&PepperPluginInstanceImpl::SetPluginThrottled,
+                     weak_factory_.GetWeakPtr(), true /* throttled */)));
+    }
   } else if (cross_origin) {
     power_saver_helper->WhitelistContentOrigin(content_origin);
   }
 
   message_channel_ = MessageChannel::Create(this, &message_channel_object_);
 
   full_frame_ = full_frame;
 
   UpdateTouchEventRequest();
   container_->setWantsWheelEvents(IsAcceptingWheelEvents());
@@ skipping 239 matching lines @@
   gfx::Rect caret(text_input_caret_);
   caret.Offset(view_data_.rect.point.x, view_data_.rect.point.y);
   return caret;
 }
 
 bool PepperPluginInstanceImpl::HandleInputEvent(
     const blink::WebInputEvent& event,
     WebCursorInfo* cursor_info) {
   TRACE_EVENT0("ppapi", "PepperPluginInstanceImpl::HandleInputEvent");
 
-  if (event.type == blink::WebInputEvent::MouseUp && power_saver_enabled_)
+  if (event.type == blink::WebInputEvent::MouseUp && is_peripheral_content_) {
+    is_peripheral_content_ = false;
     power_saver_enabled_ = false;
 
-  if (plugin_throttled_) {
-    if (event.type == blink::WebInputEvent::MouseUp)
+    RenderThread::Get()->RecordAction(
+        base::UserMetricsAction("Flash.PluginInstanceUnthrottledByClick"));
+
+    if (plugin_throttled_) {
       SetPluginThrottled(false /* throttled */);
-
-    return true;
+      return true;
+    }
   }
 
   if (!render_frame_)
     return false;
   if (WebInputEvent::isMouseEventType(event.type)) {
     render_frame_->PepperDidReceiveMouseEvent(this);
   }
 
   // Don't dispatch input events to crashed plugins.
   if (module()->is_crashed())
@@ skipping 2173 matching lines @@
 
 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_);
+void PepperPluginInstanceImpl::DisablePowerSaverByRetroactiveWhitelist() {
+  if (!is_peripheral_content_)
+    return;
+
+  is_peripheral_content_ = false;
   power_saver_enabled_ = false;
   SetPluginThrottled(false);
+
+  RenderThread::Get()->RecordAction(
+      base::UserMetricsAction("Flash.PluginInstanceUnthrottledByWhitelist"));
 }
 
 }  // namespace content