Add flag to enable MJPEG acceleration for video capture

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 f31abb764df9c542f14d627a09091a92c5cf30b7..24a34012b0deb80919a85f4a63747787ea03df4a 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6907,6 +6907,14 @@ Keep your key file in a safe place. You will need it to create new versions of y
           Makes the Toolkit-Views based App Info dialog accessible from chrome://apps or chrome://extensions in place of the native extension permissions dialog, or the details link (which is a link to the Web Store).
         </message>
       </if>
+      <if expr="chromeos">
+        <message name="IDS_FLAGS_ENABLE_ACCELERATED_MJPEG_DECODE_NAME" desc="Name of the flag to enable accelerated mjpeg decode for captured frame where available.">
+          Enable hardware-accelerated mjpeg decode for captured frame.
+        </message>
+        <message name="IDS_FLAGS_ENABLE_ACCELERATED_MJPEG_DECODE_DESCRIPTION" desc="Description for the flag to enable accelerated mjpeg decode for captured frame where available.">
+          Enable hardware-accelerated mjpeg decode for captured frame where available.
+        </message>
+      </if>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">