Plugin Power Saver: Refactor some Tiny plugin code and tests.

content/renderer/pepper/plugin_power_saver_helper.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/plugin_power_saver_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/location.h"
@@ skipping 94 matching lines @@
     const gfx::Size& unobscured_size,
     RenderFrame::RecordPeripheralDecision record_decision) const {
   if (base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kOverridePluginPowerSaverForTesting) == "always") {
     return RenderFrame::CONTENT_STATUS_PERIPHERAL;
   }
 
   auto status = PeripheralContentHeuristic::GetPeripheralStatus(
       origin_whitelist_, main_frame_origin, content_origin, unobscured_size);
 
-  // Never record ESSENTIAL_UNKNOWN_SIZE. Wait for retest after size is known.
+  // Never record UNKNOWN_SIZE. Wait for retest after size is known.
   if (record_decision == RenderFrame::RECORD_DECISION &&
-      status != RenderFrame::CONTENT_STATUS_ESSENTIAL_UNKNOWN_SIZE) {
+      status != RenderFrame::CONTENT_STATUS_UNKNOWN_SIZE) {
     UMA_HISTOGRAM_ENUMERATION(kPeripheralHeuristicHistogram, status,
                               RenderFrame::CONTENT_STATUS_NUM_ITEMS);
   }
 
   return status;
 }
 
 void PluginPowerSaverHelper::WhitelistContentOrigin(
     const url::Origin& content_origin) {
   if (origin_whitelist_.insert(content_origin).second) {
     Send(new FrameHostMsg_PluginContentOriginAllowed(
         render_frame()->GetRoutingID(), content_origin));
   }
 }
 
 }  // namespace content