Add desired width & height to drawContext (as opposed to using the width & height of the RT)

tests/RectangleTextureTest.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 "Test.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ skipping 71 matching lines @@
     SkAutoTUnref<GrTexture> src(context->textureProvider()->createTexture(
             copySrcDesc, SkBudgeted::kYes, pixels.get(), 0));
 
     context->copySurface(rectangleTexture, src);
     test_read_pixels(reporter, context, rectangleTexture, pixels.get());
 }
 
 static void test_clear(skiatest::Reporter* reporter, GrContext* context,
                        GrTexture* rectangleTexture) {
     if (rectangleTexture->asRenderTarget()) {
+        int w = rectangleTexture->width();
+        int h = rectangleTexture->height();
+
         sk_sp<GrDrawContext> dc(
-                            context->drawContext(sk_ref_sp(rectangleTexture->asRenderTarget())));
+                       context->drawContext(w, h, sk_ref_sp(rectangleTexture->asRenderTarget())));
         if (!dc) {
             ERRORF(reporter, "Could not get GrDrawContext for rectangle texture.");
             return;
         }
 
         // Clear the whole thing.
         GrColor color0 = GrColorPackRGBA(0xA, 0xB, 0xC, 0xD);
         dc->clear(nullptr, color0, false);
 
-        int w = rectangleTexture->width();
-        int h = rectangleTexture->height();
         int pixelCnt = w * h;
         SkAutoTMalloc<uint32_t> expectedPixels(pixelCnt);
 
         // The clear color is a GrColor, our readback is to kRGBA_8888, which may be different.
         uint32_t expectedColor0 = 0;
         uint8_t* expectedBytes0 = SkTCast<uint8_t*>(&expectedColor0);
         expectedBytes0[0] = GrColorUnpackR(color0);
         expectedBytes0[1] = GrColorUnpackG(color0);
         expectedBytes0[2] = GrColorUnpackB(color0);
         expectedBytes0[3] = GrColorUnpackA(color0);
@@ skipping 86 matching lines @@
 
         test_write_pixels(reporter, context, rectangleTexture);
 
         test_clear(reporter, context, rectangleTexture);
 
         GR_GL_CALL(glContext->gl(), DeleteTextures(1, &rectTexID));
     }
 }
 
 #endif