Update SkImage_NewFromTexture test

tests/ImageTest.cpp

Index: tests/ImageTest.cpp
diff --git a/tests/ImageTest.cpp b/tests/ImageTest.cpp
index efded7c6defa347edefb8c86b00947339f75ba67..2dccff2d5eb243e7aab15cf52c28deed325a6884 100644
--- a/tests/ImageTest.cpp
+++ b/tests/ImageTest.cpp
@@ -745,27 +745,18 @@ struct TextureReleaseChecker {
         static_cast<TextureReleaseChecker*>(self)->fReleaseCount++;
     }
 };
-static void check_image_color(skiatest::Reporter* reporter, SkImage* image, SkPMColor expected) {
-    const SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1);
-    SkPMColor pixel;
-    REPORTER_ASSERT(reporter, image->readPixels(info, &pixel, sizeof(pixel), 0, 0));
-    REPORTER_ASSERT(reporter, pixel == expected);
-}
-DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(SkImage_NewFromTexture, reporter, ctxInfo) {
+DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(SkImage_NewFromTextureRelease, reporter, ctxInfo) {
     GrTextureProvider* provider = ctxInfo.grContext()->textureProvider();
     const int w = 10;
     const int h = 10;
-    SkPMColor storage[w * h];
-    const SkPMColor expected0 = SkPreMultiplyColor(SK_ColorRED);
-    sk_memset32(storage, expected0, w * h);
     GrSurfaceDesc desc;
-    desc.fFlags = kRenderTarget_GrSurfaceFlag;  // needs to be a rendertarget for readpixels();
+    desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fOrigin = kDefault_GrSurfaceOrigin;
     desc.fWidth = w;
     desc.fHeight = h;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fSampleCnt = 0;
-    SkAutoTUnref<GrTexture> tex(provider->createTexture(desc, SkBudgeted::kNo, storage, w * 4));
+    SkAutoTUnref<GrTexture> tex(provider->createTexture(desc, SkBudgeted::kNo));
     if (!tex) {
         REPORTER_ASSERT(reporter, false);
         return;
@@ -783,20 +774,6 @@ DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(SkImage_NewFromTexture, reporter, ctxInfo)
         SkImage::MakeFromTexture(ctxInfo.grContext(), backendDesc, kPremul_SkAlphaType,
                                  TextureReleaseChecker::Release, &releaseChecker));
 
-    check_image_color(reporter, refImg.get(), expected0);
-
-    // Now lets jam new colors into our "external" texture, and see if the images notice
-    const SkPMColor expected1 = SkPreMultiplyColor(SK_ColorBLUE);
-    sk_memset32(storage, expected1, w * h);
-    tex->writePixels(0, 0, w, h, kSkia8888_GrPixelConfig, storage, GrContext::kFlushWrites_PixelOp);
-
-    // The cpy'd one should still see the old color
-#if 0
-    // There is no guarantee that refImg sees the new color. We are free to have made a copy. Our
-    // write pixels call violated the contract with refImg and refImg is now undefined.
-    check_image_color(reporter, refImg, expected1);
-#endif
-
     // Now exercise the release proc
     REPORTER_ASSERT(reporter, 0 == releaseChecker.fReleaseCount);
     refImg.reset(nullptr); // force a release of the image