Tracks GVR version crossed with headset type using UMA.

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index 7e193cadcf18b2ec3267c093b885d5bc022ef928..3dd090ac9d996a18fcbb9173e6eddf428f4d3de3 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -278,6 +278,7 @@ android_library("chrome_java") {
   if (enable_vr) {
     java_files += chrome_vr_java_sources
     deps += [ "//third_party/gvr-android-sdk:gvr_common_java" ]
+    srcjar_deps += [ ":chrome_vr_android_java_enums_srcjar" ]
   }
 
   # Add the actual implementation where necessary so that downstream targets
@@ -315,6 +316,14 @@ java_cpp_enum("chrome_android_java_enums_srcjar") {
   ]
 }
 
+if (enable_vr) {
+  java_cpp_enum("chrome_vr_android_java_enums_srcjar") {
+    sources = [
+      "//chrome/browser/android/vr_shell/vr_core_info.h",
+    ]
+  }
+}
+
 proto_java_library("document_tab_model_info_proto_java") {
   proto_path = "java/src/org/chromium/chrome/browser/tabmodel/document"
   sources = [