Bug 1412427 part 1: Add standard mode line & MPL boilerplate to a few gfx C++ files that are missing it entirely. r=jrmuizel

I copied the boilerplate comment directly from the Coding Style MDN page:
https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Mode_Line

MozReview-Commit-ID: 8rO6SfBIaRl

--HG--
extra : rebase_source : 90093621cbaa2a62b19e22b0eacad600fc586560

gfx/gl/AndroidSurfaceTexture.cpp

@@ -1,3 +1,9 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 #ifdef MOZ_WIDGET_ANDROID
 
 #include "AndroidSurfaceTexture.h"

gfx/layers/GLImages.cpp

@@ -1,3 +1,8 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "GLImages.h"
 #include "GLContext.h"

gfx/tests/gtest/TestTreeTraversal.cpp

@@ -1,3 +1,9 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 #include <vector>
 #include "mozilla/RefPtr.h"
 #include "gtest/gtest.h"

gfx/tests/gtest/gfxSurfaceRefCountTest.cpp

@@ -1,3 +1,9 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 #include <stdio.h>
 
 #include "gtest/gtest.h"