Split apart the PPAPI GN targets

ppapi/lib/gl/gles2/BUILD.gn

Index: ppapi/lib/gl/gles2/BUILD.gn
diff --git a/chrome/browser/metro_utils/BUILD.gn b/ppapi/lib/gl/gles2/BUILD.gn
similarity index 58%
copy from chrome/browser/metro_utils/BUILD.gn
copy to ppapi/lib/gl/gles2/BUILD.gn
index 86a28875cc8bb6787a0807467adcbb3072e01ce0..368defa7aef0e3e2be50afb3d0d492acf5a81f6f 100644
--- a/chrome/browser/metro_utils/BUILD.gn
+++ b/ppapi/lib/gl/gles2/BUILD.gn
@@ -1,14 +1,17 @@
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
+# found in the LICENSE file.
 
-source_set("metro_utils") {
-  deps = [
-    "//base",
-    "//chrome/installer/util",
-  ]
+source_set("gles2") {
   sources = [
-    "metro_chrome_win.cc",
-    "metro_chrome_win.h",
+    "gl2ext_ppapi.c",
+    "gl2ext_ppapi.h",
+    "gles2.c",
+  ]
+
+  include_dirs = [ "lib/gl/include" ]
+
+  deps = [
+    "//ppapi/c",
   ]
 }