Revert of Add the method isOpaque() to SkImage

tests/ImageIsOpaqueTest.cpp

-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkTypes.h"
-#if SK_SUPPORT_GPU
-#include "GrContextFactory.h"
-#endif
-#include "SkImage.h"
-#include "SkSurface.h"
-
-#include "Test.h"
-
-DEF_TEST(ImageIsOpaqueTest, reporter) {
-    SkImageInfo infoTransparent = SkImageInfo::MakeN32Premul(5, 5);
-    SkAutoTUnref<SkSurface> surfaceTransparent(SkSurface::NewRaster(infoTransparent));
-    REPORTER_ASSERT(reporter, !surfaceTransparent->newImageSnapshot()->isOpaque());
-
-    SkImageInfo infoOpaque = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
-    SkAutoTUnref<SkSurface> surfaceOpaque(SkSurface::NewRaster(infoOpaque));
-    REPORTER_ASSERT(reporter, surfaceOpaque->newImageSnapshot()->isOpaque());
-}
-
-#if SK_SUPPORT_GPU
-
-DEF_GPUTEST(ImageIsOpaqueTest_GPU, reporter, factory) {
-    for (int i = 0; i < GrContextFactory::kGLContextTypeCnt; ++i) {
-        GrContextFactory::GLContextType glCtxType = (GrContextFactory::GLContextType) i;
-
-        if (!GrContextFactory::IsRenderingGLContext(glCtxType)) {
-            continue;
-        }
-
-        GrContext* context = factory->get(glCtxType);
-
-        if (NULL == context) {
-            continue;
-        }
-
-        SkImageInfo infoTransparent = SkImageInfo::MakeN32Premul(5, 5);
-        SkAutoTUnref<SkSurface> surfaceTransparent(SkSurface::NewRenderTarget(context, infoTransparent));
-        REPORTER_ASSERT(reporter, !surfaceTransparent->newImageSnapshot()->isOpaque());
-
-        SkImageInfo infoOpaque = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
-        SkAutoTUnref<SkSurface> surfaceOpaque(SkSurface::NewRenderTarget(context, infoOpaque));
-        REPORTER_ASSERT(reporter, !surfaceOpaque->newImageSnapshot()->isOpaque());
-
-    }
-}
-
-#endif