Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/angle/GLContext_angle.h

+
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef GLContext_angle_DEFINED
+#define GLContext_angle_DEFINED
+
+#include "gl/GLContext.h"
+
+namespace sk_gpu_test {
+
+/**
+ * Creates a GrGLInterface for the currently ANGLE GL context currently bound in ANGLE's EGL
+ * implementation.
+ */
+const GrGLInterface* CreateANGLEGLInterface();
+
+#ifdef SK_BUILD_FOR_WIN
+/** Creates a GLContext backed by ANGLE's Direct3D backend. */
+GLContext* CreateANGLEDirect3DGLContext();
+#endif
+
+/** Creates a GLContext backed by ANGLE's OpenGL backend. */
+GLContext* CreateANGLEOpenGLGLContext();
+
+}  // namespace sk_gpu_test
+#endif