Reland of Android WebVR implementation, Cardboard 0.5.5 SDK

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index dd6b7a9ee343ed239722628bb5d1f8c3baaccfee..1cc05581cf0b42a7dc279cb7651a1bd37e029ccb 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1030,10 +1030,15 @@
         }, {
           'pkg-config': 'pkg-config'
         }],
+
+        # Enable WebVR support by default on Android
+        # Still requires command line flag to access API
+        ['OS=="android"', {
+          'enable_webvr%': 1,
+        }, {
+          'enable_webvr%': 0,
+        }],
       ],
-
-      # WebVR support disabled until platform implementations have been added
-      'enable_webvr%': 0,
 
       # Setting this to '0' will cause V8's startup snapshot to be
       # embedded in the binary instead of being a external files.