Plugin Power Saver: Make Unthrottle metric collection more consistent

components/plugins/renderer/loadable_plugin_placeholder.h

Index: components/plugins/renderer/loadable_plugin_placeholder.h
diff --git a/components/plugins/renderer/loadable_plugin_placeholder.h b/components/plugins/renderer/loadable_plugin_placeholder.h
index 5f3748f8c2296058407b1d9fcb76b34b19fa175f..402fdc7e4d185b976f4d1fe19239e21284e505dc 100644
--- a/components/plugins/renderer/loadable_plugin_placeholder.h
+++ b/components/plugins/renderer/loadable_plugin_placeholder.h
@@ -44,7 +44,8 @@ class LoadablePluginPlaceholder : public PluginPlaceholder {
   ~LoadablePluginPlaceholder() override;
 
 #if defined(ENABLE_PLUGINS)
-  void DisablePowerSaverForInstance();
+  void DisablePowerSaverForInstance(
+      content::PluginInstanceThrottler::PowerSaverUnthrottleMethod method);
 #endif
 
   void OnLoadBlockedPlugins(const std::string& identifier);
@@ -111,6 +112,9 @@ class LoadablePluginPlaceholder : public PluginPlaceholder {
 
   bool allow_loading_;
 
+  // True if the placeholder was replaced with the real plugin.
+  bool placeholder_was_replaced_;
+
   bool hidden_;
   bool finished_loading_;
   std::string identifier_;