Add --enable-webkit-media-source for Android instead of hardcoding it to be disabled.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index fa07c5d368d47d4ce34801fc3b1ad51172591434..894029f5ef86d5272912b50ccd1453b3155a63a2 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -695,6 +695,15 @@ const Experiment kExperiments[] = {
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAsyncDns,
                               switches::kDisableAsyncDns)
   },
+#if defined(ANDROID) && !defined(GOOGLE_TV)
+  {
+    "enable-media-source",
+    IDS_FLAGS_ENABLE_WEBKIT_MEDIA_SOURCE_NAME,
+    IDS_FLAGS_ENABLE_WEBKIT_MEDIA_SOURCE_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableWebKitMediaSource)
+  },
+#else
   {
     "disable-media-source",
     IDS_FLAGS_DISABLE_WEBKIT_MEDIA_SOURCE_NAME,
@@ -702,6 +711,7 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kDisableWebKitMediaSource)
   },
+#endif
   {
     "disable-encrypted-media",
     IDS_FLAGS_DISABLE_ENCRYPTED_MEDIA_NAME,