Remove unused MakeFromTextureCopy API

tests/ImageTest.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 <functional>
 #include <initializer_list>
 #include <vector>
@@ skipping 764 matching lines @@
     backendDesc.fConfig = kSkia8888_GrPixelConfig;
     backendDesc.fFlags = kRenderTarget_GrBackendTextureFlag;
     backendDesc.fWidth = w;
     backendDesc.fHeight = h;
     backendDesc.fSampleCnt = 0;
     backendDesc.fTextureHandle = tex->getTextureHandle();
     TextureReleaseChecker releaseChecker;
     sk_sp<SkImage> refImg(
         SkImage::MakeFromTexture(ctxInfo.grContext(), backendDesc, kPremul_SkAlphaType,
                                  TextureReleaseChecker::Release, &releaseChecker));
-    sk_sp<SkImage> cpyImg(SkImage::MakeFromTextureCopy(ctxInfo.grContext(), backendDesc,
-                                                       kPremul_SkAlphaType));
 
     check_image_color(reporter, refImg.get(), expected0);
-    check_image_color(reporter, cpyImg.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
-    check_image_color(reporter, cpyImg.get(), expected0);
 
     // Now exercise the release proc
     REPORTER_ASSERT(reporter, 0 == releaseChecker.fReleaseCount);
     refImg.reset(nullptr); // force a release of the image
     REPORTER_ASSERT(reporter, 1 == releaseChecker.fReleaseCount);
 }
 
 static void check_images_same(skiatest::Reporter* reporter, const SkImage* a, const SkImage* b) {
     if (a->width() != b->width() || a->height() != b->height()) {
         ERRORF(reporter, "Images must have the same size");
@@ skipping 150 matching lines @@
                         otherContextInfo.grContext(), buffer, budgeted));
                     REPORTER_ASSERT(reporter, !newImage2);
                     testContext->makeCurrent();
                 }
             }
             sk_free(buffer);
         }
     }
 }
 #endif