Pull in vr_shell code for webvr

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index fcf028fed554a6b822c8731be66abbda756b175c..82ec4ce3f5af17e14c21441201d668c572334718 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -246,9 +246,7 @@ android_library("chrome_java") {
     ]
   }
 
-  # VrActivity currently depends on ChromeTabbedActivity which is part of
-  # android_java_ui.
-  if (enable_vr_shell && android_java_ui) {
+  if (enable_vr_shell || enable_webvr) {
     java_files += chrome_vr_java_sources

[agrieve, 2016/10/07 17:36:43]

note: if you ever have java files that will be different for shell vs webvr,
it'd be better to just inline them here rather than have this
chrome_vr_java_sources variable.

[bshe, 2016/10/07 20:36:22]

We are expecting to ship webvr and vr shell at M56. And once shipped,
does it mean we will need to move these files back to  java_sources.gni
like other java files. If this is the case, I would prefer to keep it this way
for now if you don't mind.

     deps += [
       "//third_party/gvr-android-sdk:gvr_base_java",