Remove is_debug from enable_webvr flag (N SDK is now available!)

build/config/features.gni

Index: build/config/features.gni
diff --git a/build/config/features.gni b/build/config/features.gni
index 304fafcd9139a3d327babe0194bf58a38a09b870..883e57056cd7683b51ababd33a8376548cce3639 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -105,7 +105,10 @@ declare_args() {
 
   # Enable WebVR support by default on Android
   # Still requires command line flag to access API
-  enable_webvr = is_android && is_component_build && is_debug &&
+  # TODO(bshe): Remove is_component_build once we can statically link gvr
+  # library. Currently gvr library only has a prebuild so file which causes
+  # linking issue for non component build.
+  enable_webvr = is_android && is_component_build &&
                  (current_cpu == "x86" || current_cpu == "x64" ||
                   current_cpu == "arm" || current_cpu == "arm64")
 }