Fix SkTileImageFilter when srcRect is a superset of bitmap bounds.

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index e773aed9484d4d0c7a7d552ce94bfb471d068d87..9d19952e54ecb32d6df8eb9b6bde09c151e503a9 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -158,7 +158,7 @@ class SkGpuImageFilterProxy : public SkImageFilter::Proxy {
 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;
@@ -166,6 +166,8 @@ public:
         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) {