Revert of SkImage::NewFromGenerator(SkImageGenerator*), and a unit test.

tests/CachedDecodingPixelRefTest.cpp

Index: tests/CachedDecodingPixelRefTest.cpp
diff --git a/tests/CachedDecodingPixelRefTest.cpp b/tests/CachedDecodingPixelRefTest.cpp
index b409987392ab36af2e8ea1554f9dfa06048d0d8f..8de7da79a252e54404cd64457dee387234b70f32 100644
--- a/tests/CachedDecodingPixelRefTest.cpp
+++ b/tests/CachedDecodingPixelRefTest.cpp
@@ -322,42 +322,3 @@
     check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
                    reporter, kSkDiscardable_PixelRefType, globalPool);
 }
-
-////////////////////////////////////////////////////////////////////////////////
-
-DEF_TEST(Image_NewFromGenerator, r) {
-    TestImageGenerator::TestType testTypes[] = {
-        TestImageGenerator::kFailGetInfo_TestType,
-        TestImageGenerator::kFailGetPixels_TestType,
-        TestImageGenerator::kSucceedGetPixels_TestType,
-    };
-    for (size_t i = 0; i < SK_ARRAY_COUNT(testTypes); ++i) {
-        TestImageGenerator::TestType test = testTypes[i];
-        SkImageGenerator* gen = SkNEW_ARGS(TestImageGenerator, (test, r));
-        SkAutoTUnref<SkImage> image(SkImage::NewFromGenerator(gen));
-        if (TestImageGenerator::kFailGetInfo_TestType == test) {
-            REPORTER_ASSERT(r, NULL == image.get());
-            continue;
-        }
-        if (NULL == image.get()) {
-            ERRORF(r, "SkImage::NewFromGenerator unexpecedly failed ["
-                   SK_SIZE_T_SPECIFIER "]", i);
-            continue;
-        }
-        REPORTER_ASSERT(r, TestImageGenerator::Width() == image->width());
-        REPORTER_ASSERT(r, TestImageGenerator::Height() == image->height());
-
-        SkBitmap bitmap;
-        SkAssertResult(bitmap.allocN32Pixels(TestImageGenerator::Width(),
-                                             TestImageGenerator::Height()));
-        SkCanvas canvas(bitmap);
-        canvas.clear(SK_ColorMAGENTA);
-        image->draw(&canvas, 0, 0, NULL);
-        SkColor color = bitmap.getColor(0, 0);
-        if (TestImageGenerator::kSucceedGetPixels_TestType == test) {
-            REPORTER_ASSERT(r, TestImageGenerator::Color() == color);
-        } else {
-            REPORTER_ASSERT(r, SK_ColorMAGENTA == color);
-        }
-    }
-}