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 20b7b9f0b4e08607dca1e4d4d78ec4a30d0148f9..3a9721677b37b1e6fbf1e5c2d4863a3acb68a309 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6970,6 +6970,14 @@ Keep your key file in a safe place. You will need it to create new versions of y
           Changes the behavior of Cmd+` when a Chrome App becomes active. When enabled, Chrome Apps will not be cycled when Cmd+` is pressed from a browser window, and browser windows will not be cycled when a Chrome App is active.
         </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.">