Plugin Power Saver: Add Poster Param metric.

chrome/renderer/chrome_content_renderer_client.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 "chrome/renderer/chrome_content_renderer_client.h"
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
@@ skipping 251 matching lines @@
 void IsGuestViewApiAvailableToScriptContext(
     bool* api_is_available,
     extensions::ScriptContext* context) {
   if (context->GetAvailability("guestViewInternal").is_available()) {
     *api_is_available = true;
   }
 }
 #endif
 
 #if defined(ENABLE_PLUGINS)
+// Presence of the poster param within plugin object tags.
+// These numeric values are used in UMA logs; do not change them.
+enum PosterParamPresence {
+  POSTER_PRESENCE_NO_PARAM_PPS_DISABLED = 0,
+  POSTER_PRESENCE_NO_PARAM_PPS_ENABLED = 1,
+  POSTER_PRESENCE_PARAM_EXISTS_PPS_DISABLED = 2,
+  POSTER_PRESENCE_PARAM_EXISTS_PPS_ENABLED = 3,
+  POSTER_PRESENCE_NUM_ITEMS
+};
+
+const char kPluginPowerSaverPosterParamPresenceHistogram[] =
+    "Plugin.PowerSaver.PosterParamPresence";
+
+void RecordPosterParamPresence(int presence) {

[sky, 2015/02/20 18:12:26]

int->PosterParamPresence ?

[tommycli, 2015/02/20 18:17:03]

Done.

+  UMA_HISTOGRAM_ENUMERATION(kPluginPowerSaverPosterParamPresenceHistogram,
+                            presence, POSTER_PRESENCE_NUM_ITEMS);
+}
+
+void TrackPosterParamPresence(const blink::WebPluginParams& params,
+                              bool power_saver_enabled) {
+  DCHECK_EQ(params.attributeNames.size(), params.attributeValues.size());
+
+  for (size_t i = 0; i < params.attributeNames.size(); ++i) {
+    if (params.attributeNames[i].utf8() == "poster") {
+      if (power_saver_enabled)
+        RecordPosterParamPresence(POSTER_PRESENCE_PARAM_EXISTS_PPS_ENABLED);
+      else
+        RecordPosterParamPresence(POSTER_PRESENCE_PARAM_EXISTS_PPS_DISABLED);
+
+      return;
+    }
+  }
+
+  if (power_saver_enabled)
+    RecordPosterParamPresence(POSTER_PRESENCE_NO_PARAM_PPS_ENABLED);
+  else
+    RecordPosterParamPresence(POSTER_PRESENCE_NO_PARAM_PPS_DISABLED);
+}
+
 GURL GetPluginInstancePosterImage(const blink::WebPluginParams& params,
                                   const GURL& page_base_url) {
   DCHECK_EQ(params.attributeNames.size(), params.attributeValues.size());
 
   for (size_t i = 0; i < params.attributeNames.size(); ++i) {
     if (params.attributeNames[i].utf8() == "poster" &&
         !params.attributeValues[i].isEmpty()) {
       return page_base_url.Resolve(params.attributeValues[i].utf8());
     }
   }
@@ skipping 518 matching lines @@
         }
 #endif  // !defined(DISABLE_NACL) && defined(ENABLE_EXTENSIONS)
 
 #if defined(ENABLE_PLUGINS)
         bool power_saver_enabled =
             status_value ==
             ChromeViewHostMsg_GetPluginInfo_Status::kPlayImportantContent;
         bool blocked_for_background_tab =
             render_frame->IsHidden() && power_saver_enabled;
 
+        if (info.name == ASCIIToUTF16(content::kFlashPluginName))
+          TrackPosterParamPresence(params, power_saver_enabled);
+
         GURL poster_url;
         if (power_saver_enabled) {
           poster_url =
               GetPluginInstancePosterImage(params, frame->document().url());
         }
 
         // Delay loading plugins if prerendering.
         // TODO(mmenke):  In the case of prerendering, feed into
         //                ChromeContentRendererClient::CreatePlugin instead, to
         //                reduce the chance of future regressions.
@@ skipping 758 matching lines @@
   if (mime_type == content::kBrowserPluginMimeType) {
     return new extensions::ExtensionsGuestViewContainer(render_frame);
   } else {
     return new extensions::MimeHandlerViewContainer(
         render_frame, mime_type, original_url);
   }
 #else
   return NULL;
 #endif
 }