Revert "Updated to GVR 1.0 SDK"

third_party/gvr-android-sdk/proguard/base.flags

Index: third_party/gvr-android-sdk/proguard/base.flags
diff --git a/third_party/gvr-android-sdk/proguard/base.flags b/third_party/gvr-android-sdk/proguard/base.flags
new file mode 100644
index 0000000000000000000000000000000000000000..6ae223f5000b8d4864917bb8b49fb53e1b573183
--- /dev/null
+++ b/third_party/gvr-android-sdk/proguard/base.flags
@@ -0,0 +1,10 @@
+# Proguard rules for commonly-shared libraries in gvr.
+
+-keepattributes *Annotation*
+
+# Keep natively accessed methods used by GVR.
+-keep class com.google.vr.cardboard.UsedByNative
+-keep @com.google.vr.cardboard.UsedByNative class *
+-keepclassmembers class * {
+    @com.google.vr.cardboard.UsedByNative *;
+}