Move SkGLContext and some GrGLInterface implementations to skgputest module

tests/EGLImageTest.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 "GrContextFactory.h"
 #include "gl/GrGLGpu.h"
 #include "gl/GrGLUtil.h"
-#include "gl/SkGLContext.h"
+#include "gl/GLContext.h"
 
-static void cleanup(SkGLContext* glctx0, GrGLuint texID0, SkGLContext* glctx1, GrContext* grctx1,
+using sk_gpu_test::GLContext;
+
+static void cleanup(GLContext* glctx0, GrGLuint texID0, GLContext* glctx1, GrContext* grctx1,
                     const GrGLTextureInfo* grbackendtex1, GrEGLImage image1) {
     if (glctx1) {
         glctx1->makeCurrent();
         if (grctx1) {
             if (grbackendtex1) {
                 GrGLGpu* gpu1 = static_cast<GrGLGpu*>(grctx1->getGpu());
                 GrBackendObject handle = reinterpret_cast<GrBackendObject>(grbackendtex1);
                 gpu1->deleteTestingOnlyBackendTexture(handle, false);
             }
             grctx1->unref();
@@ skipping 57 matching lines @@
     // extensions to run this test.
 
     if (kGLES_GrGLStandard != glCtx0->gl()->fStandard) {
         return;
     }
     GrGLGpu* gpu0 = static_cast<GrGLGpu*>(context0->getGpu());
     if (!gpu0->glCaps().glslCaps()->externalTextureSupport()) {
         return;
     }
 
-    SkAutoTDelete<SkGLContext> glCtx1 = glCtx0->createNew();
+    SkAutoTDelete<GLContext> glCtx1 = glCtx0->createNew();
     if (!glCtx1) {
         return;
     }
     GrContext* context1 = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)glCtx1->gl());
     const GrGLTextureInfo* backendTexture1 = nullptr;
     GrEGLImage image = GR_EGL_NO_IMAGE;
     GrGLTextureInfo externalTexture;
     externalTexture.fID = 0;
 
     if (!context1) {
@@ skipping 92 matching lines @@
     test_read_pixels(reporter, context0, externalTextureObj, pixels.get());
 
     test_write_pixels(reporter, context0, externalTextureObj);
 
     test_copy_surface(reporter, context0, externalTextureObj, pixels.get());
 
     cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
 }
 
 #endif