Move SkGLContext and some GrGLInterface implementations to skgputest module

tests/TestTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
-#include "gl/SkGLContext.h"
+#include "gl/GLContext.h"
 #endif
 
 
 // This is an example of a normal test.
 DEF_TEST(TestNormal, reporter) {
     REPORTER_ASSERT(reporter, reporter);
 }
 
 // This is an example of a GPU test that uses common GrContextFactory factory to do the test.
 #if SK_SUPPORT_GPU
@@ skipping 34 matching lines @@
 // This is an example of a GPU test that tests a property that uses the null GPU context.  It should
 // be used if the test tests some behavior that is mocked with the null context.
 #if SK_SUPPORT_GPU
 DEF_GPUTEST_FOR_NULL_CONTEXT(TestGpuNullContext, reporter, context) {
     REPORTER_ASSERT(reporter, reporter);
     REPORTER_ASSERT(reporter, context);
 }
 #endif
 
 // This is an example of a GPU test that tests a property that should work for all GPU contexts.
-// It uses the additional SkGLContext* glContext to implement the test.
+// It uses the additional GLContext* glContext to implement the test.
 #if SK_SUPPORT_GPU
 DEF_GPUTEST_FOR_ALL_CONTEXTS(TestGpuGrContextAndGLContext, reporter, context, glContext) {
     REPORTER_ASSERT(reporter, reporter);
     REPORTER_ASSERT(reporter, context);
     REPORTER_ASSERT(reporter, glContext);
 }
 #endif