Fix printfs for Windows and undo speculative test disable

tests/ReadWriteAlphaTest.cpp

 /*
  * Copyright 2012 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"
 
 // This test is specific to the GPU backend.
@@ skipping 19 matching lines @@
                 return;
             }
         }
     }
 }
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadWriteAlpha, reporter, context) {
     unsigned char alphaData[X_SIZE * Y_SIZE];
 
     bool match;
-#ifdef SK_BUILD_FOR_WIN // TODO: Figure out why this breaks on Windows.
-    static const size_t kRowBytes[] = {0, X_SIZE};
-#else
     static const size_t kRowBytes[] = {0, X_SIZE, X_SIZE + 1, 2 * X_SIZE - 1};
-#endif
     for (int rt = 0; rt < 2; ++rt) {
         GrSurfaceDesc desc;
         // let Skia know we will be using this texture as a render target
         desc.fFlags     = rt ? kRenderTarget_GrSurfaceFlag : kNone_GrSurfaceFlags;
         // it is a single channel texture
         desc.fConfig    = kAlpha_8_GrPixelConfig;
         desc.fWidth     = X_SIZE;
         desc.fHeight    = Y_SIZE;
 
         // We are initializing the texture with zeros here
@@ skipping 23 matching lines @@
             SkAutoTDeleteArray<uint8_t> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
             // clear readback to something non-zero so we can detect readback failures
             memset(readback.get(), 0x1, nonZeroRowBytes * Y_SIZE);
 
             // read the texture back
             texture->readPixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig,
                                 readback.get(), rowBytes);
 
             // make sure the original & read back versions match
             SkString msg;
-            msg.printf("rt:%d, rb:%zd", rt, rowBytes);
+            msg.printf("rt:%d, rb:%d", rt, SkToU32(rowBytes));
             validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
                                 alphaData, msg);
 
             // Now try writing on the single channel texture (if we could create as a RT).
             if (texture->asRenderTarget()) {
                 SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
                 SkAutoTUnref<SkBaseDevice> device(SkGpuDevice::Create(
                     texture->asRenderTarget(), &props, SkGpuDevice::kUninit_InitContents));
                 SkCanvas canvas(device);
 
                 SkPaint paint;
 
                 const SkRect rect = SkRect::MakeLTRB(-10, -10, X_SIZE + 10, Y_SIZE + 10);
 
                 paint.setColor(SK_ColorWHITE);
 
                 canvas.drawRect(rect, paint);
 
                 memset(readback.get(), 0x1, nonZeroRowBytes * Y_SIZE);
                 texture->readPixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig, readback.get(),
                                     rowBytes);
 
                 match = true;
                 for (int y = 0; y < Y_SIZE && match; ++y) {
                     for (int x = 0; x < X_SIZE && match; ++x) {
                         uint8_t rbValue = readback.get()[y * nonZeroRowBytes + x];
                         if (0xFF != rbValue) {
                             ERRORF(reporter,
                                    "Failed alpha readback after clear. Expected: 0xFF, Got: 0x%02x"
-                                   " at (%d,%d), rb:%zd", rbValue, x, y, rowBytes);
+                                   " at (%d,%d), rb:%d", rbValue, x, y, SkToU32(rowBytes));
                             match = false;
                         }
                     }
                 }
             }
         }
     }
 
     static const GrPixelConfig kRGBAConfigs[] {
         kRGBA_8888_GrPixelConfig,
@@ skipping 40 matching lines @@
                 SkAutoTDeleteArray<uint8_t> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
                 // Clear so we don't accidentally see values from previous iteration.
                 memset(readback.get(), 0x0, nonZeroRowBytes * Y_SIZE);
 
                 // read the texture back
                 texture->readPixels(0, 0, desc.fWidth, desc.fHeight, kAlpha_8_GrPixelConfig,
                                     readback.get(), rowBytes);
 
                 // make sure the original & read back versions match
                 SkString msg;
-                msg.printf("rt:%d, rb:%zd", rt, rowBytes);
+                msg.printf("rt:%d, rb:%d", rt, SkToU32(rowBytes));
                 validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
                                     alphaData, msg);
             }
         }
     }
 }
 
 #endif