Fix SkTileImageFilter when srcRect is a superset of bitmap bounds.

src/image/SkImage_Gpu.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 "GrCaps.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
@@ skipping 140 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 class SkGpuImageFilterProxy : public SkImageFilter::Proxy {
     GrContext* fCtx;
 
 public:
     SkGpuImageFilterProxy(GrContext* ctx) : fCtx(ctx) {}
 
-    SkBaseDevice* createDevice(int width, int height) override {
+    SkBaseDevice* createDevice(int width, int height, bool tile) override {
         GrSurfaceDesc desc;
         desc.fConfig = kSkia8888_GrPixelConfig;
         desc.fFlags = kRenderTarget_GrSurfaceFlag;
         desc.fWidth = width;
         desc.fHeight = height;
         desc.fSampleCnt = 0;
 
+        // For now, we ignore the tile param and always allocate tileable
+        // textures.
         SkAutoTUnref<GrTexture> texture(fCtx->textureProvider()->createTexture(desc, true));
 
         if (texture) {
             SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
             return SkGpuDevice::Create(texture->asRenderTarget(), width, height, &props,
                                        SkGpuDevice::kClear_InitContents);
         } else {
             return nullptr;
         }
     }
@@ skipping 189 matching lines @@
     if (!dst) {
         return nullptr;
     }
     
     const SkIRect srcR = SkIRect::MakeWH(desc.fWidth, desc.fHeight);
     const SkIPoint dstP = SkIPoint::Make(0, 0);
     ctx->copySurface(dst, src, srcR, dstP, GrContext::kFlushWrites_PixelOp);
     return dst;
 }