Add libvpx wrapper to media to support VP9 video decoding.

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 7de43cfa2fcb77f910545c71e1caca7f76086fb8..6cc1a13fbdf7569216f914f3e67a8e131f50196c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6599,6 +6599,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_OPUS_PLAYBACK_DESCRIPTION" desc="Description for the flag to enable Opus playback in &lt;video&gt; elements.">
         Enable experimental Opus playback in the video element.
       </message>
+      <message name="IDS_FLAGS_ENABLE_VP9_PLAYBACK_NAME" desc="Title for the flag to enable VP9 playback in &lt;video&gt; elements.">
+        Enable VP9 playback in &lt;video&gt; elements.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_VP9_PLAYBACK_DESCRIPTION" desc="Description for the flag to enable VP9 playback in &lt;video&gt; elements.">
+        Enable experimental VP9 playback in the video element.
+      </message>
       <message name="IDS_FLAGS_AURA_TRANSLUCENT_FRAMES_NAME" desc="Title for the flag to enable fancy translucent windows.">
         Translucent windows
       </message>
@@ -9295,7 +9301,7 @@ The following plug-in is unresponsive: <ph name="PLUGIN_NAME">$1
       <if expr="pp_ifdef('android') or pp_ifdef('ios')">
         <message name="IDS_ERRORPAGES_SUGGESTION_PROXY_CONFIG" desc="When a webpage fails to load, in some cases we suggest checking the proxy server configuration, or disabling the proxy server.">
           If you use a proxy server, check your proxy settings or contact your
-          network administrator to make sure the proxy server is working. 
+          network administrator to make sure the proxy server is working.
         </message>
       </if>
       <if expr="not pp_ifdef('android') and not pp_ifdef('ios')">