Adding flag for turning on the Media Source API

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 777410e6b887434f0ae4b3f9aae672b562a80fcd..2dedb19875af86584da50a2565a59e9d514f3c8c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4838,6 +4838,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       </message>
       <message name="IDS_FLAGS_ENABLE_PHOTO_EDITOR_DESCRIPTION" desc="Description for the flag to enable the photo editor.">
       </message>
+      <message name="IDS_FLAGS_ENABLE_MEDIA_SOURCE_NAME" desc="Title for the flag to enable the Media Source API on &lt;video&gt; elements.">
+        Enable Media Source API on &lt;video&gt; elements.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_MEDIA_SOURCE_DESCRIPTION" desc="Description for the flag to enable the Media Source API on &lt;video&gt; elements.">
+        Enable experimental Media Source API on the video elements. This API allows JavaScript to send media data directly to a video element.
+      </message>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">