Plugin Power Saver: Always mark 'tiny' plugins as essential.

content/renderer/pepper/pepper_plugin_instance_throttler.cc

 // Copyright 2014 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_throttler.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
@@ skipping 112 matching lines @@
       plugin_throttled_(false),
       weak_factory_(this) {
   GURL content_origin = plugin_url.GetOrigin();
 
   if (is_flash_plugin_ && RenderThread::Get()) {
     RenderThread::Get()->RecordAction(
         base::UserMetricsAction("Flash.PluginInstanceCreated"));
     RecordFlashSizeMetric(bounds.width, bounds.height);
   }
 
-  bool cross_origin = false;
+  bool is_main_attraction = false;
   is_peripheral_content_ =
       is_flash_plugin_ &&
-      power_saver_helper->ShouldThrottleContent(content_origin, bounds.width,
-                                                bounds.height, &cross_origin);
+      power_saver_helper->ShouldThrottleContent(
+          content_origin, bounds.width, bounds.height, &is_main_attraction);
 
   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(&PepperPluginInstanceThrottler::
                                        DisablePowerSaverByRetroactiveWhitelist,
                                    weak_factory_.GetWeakPtr()));
 
     if (power_saver_enabled_) {
       needs_representative_keyframe_ = true;
       base::MessageLoop::current()->PostDelayedTask(
           FROM_HERE,
           base::Bind(&PepperPluginInstanceThrottler::SetPluginThrottled,
                      weak_factory_.GetWeakPtr(), true /* throttled */),
           base::TimeDelta::FromMilliseconds(kThrottleTimeout));
     }
-  } else if (cross_origin) {
+  } else if (is_main_attraction) {
     power_saver_helper->WhitelistContentOrigin(content_origin);
   }
 }
 
 PepperPluginInstanceThrottler::~PepperPluginInstanceThrottler() {
 }
 
 void PepperPluginInstanceThrottler::OnImageFlush(const SkBitmap* bitmap) {
   if (!needs_representative_keyframe_ || !bitmap)
     return;
@@ skipping 48 matching lines @@
     return;
 
   is_peripheral_content_ = false;
   power_saver_enabled_ = false;
   SetPluginThrottled(false);
 
   RecordUnthrottleMethodMetric(UNTHROTTLE_METHOD_BY_WHITELIST);
 }
 
 }  // namespace content