Android: enable/disable WebRTC HW H264 with a flag.

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 c61990d43bbff72c48b47d8486dbdd610db1fcbf..734ea772204ccd2b1c784b6e531dfe7d5767a72e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5632,6 +5632,18 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_WEBRTC_HW_ENCODING_DESCRIPTION" desc="Description of chrome:flags option to turn off WebRTC hardware video encoding support.">
         Support in WebRTC for encoding video streams using platform hardware.
       </message>
+      <message name="IDS_FLAGS_WEBRTC_HW_ENCODING_ALL">
+        Disable all hw encoding
+      </message>
+      <message name="IDS_FLAGS_WEBRTC_HW_ENCODING_VPX">
+        Disable vpx hw encoding
+      </message>
+      <message name="IDS_FLAGS_WEBRTC_HW_ENCODING_H264">
+        Disable h264 hw encoding
+      </message>
+      <message name="IDS_FLAGS_WEBRTC_HW_ENCODING_NONE">
+        Disable none hw encoding
+      </message>
       <message name="IDS_FLAGS_WEBRTC_DTLS12_NAME" desc="Name of chrome:flags option to enable DTLS 1.2 for WebRTC">
         Negotiation with DTLS 1.2 for WebRTC
       </message>