Plugin Power Saver: Add flag to experiment behind.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index fcbdb4b00d5dadb30c4cdbb572f183da2d898004..23dc6ebcaa5ca67e221defd294643d99e910c460 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6076,6 +6076,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ALLOW_NACL_SOCKET_API_DESCRIPTION" desc="Description for the NaCl Socket API feature.">
         Allows applications to use NaCl Socket API. Use only to test NaCl plugins.
       </message>
+      <message name="IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_NAME" desc="Name for the Plugin Power Saver feature.">
+        Enable Plugin Power Saver.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_DESCRIPTION" desc="Description for the Plugin Power Saver feature.">
+        Enables experimental power saver mode for peripheral plugin content.
+      </message>
       <message name="IDS_FLAGS_ENABLE_PINCH_SCALE_NAME" desc="Name of the flag to turn on experiental pinch to scale.">
         Enable pinch scale.
       </message>