Plugin Power Saver Tiny: Add Unthrottle by Omnibox bucket to histogram.

components/plugins/renderer/loadable_plugin_placeholder.cc

 // Copyright 2015 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 "components/plugins/renderer/loadable_plugin_placeholder.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 245 matching lines @@
       LoadPlugin();
   }
 }
 
 void LoadablePluginPlaceholder::OnLoadBlockedPlugins(
     const std::string& identifier) {
   if (!identifier.empty() && identifier != identifier_)
     return;
 
   RenderThread::Get()->RecordAction(UserMetricsAction("Plugin_Load_UI"));
-  MarkPluginEssential(PluginInstanceThrottler::UNTHROTTLE_METHOD_DO_NOT_RECORD);
+  MarkPluginEssential(
+      PluginInstanceThrottler::UNTHROTTLE_METHOD_BY_OMNIBOX_ICON);
   LoadPlugin();
 }
 
 void LoadablePluginPlaceholder::OnSetIsPrerendering(bool is_prerendering) {
   // Prerendering can only be enabled prior to a RenderView's first navigation,
   // so no BlockedPlugin should see the notification that enables prerendering.
   DCHECK(!is_prerendering);
   if (is_blocked_for_prerendering_) {
     is_blocked_for_prerendering_ = false;
     if (!LoadingBlocked())
@@ skipping 82 matching lines @@
   return identifier_;
 }
 
 bool LoadablePluginPlaceholder::LoadingBlocked() const {
   DCHECK(allow_loading_);
   return is_blocked_for_tinyness_ || is_blocked_for_background_tab_ ||
          is_blocked_for_power_saver_poster_ || is_blocked_for_prerendering_;
 }
 
 }  // namespace plugins