tunnel down texture-size-constraint to imagefilters

src/core/SkImageFilter.cpp

Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index d7af4e65d0656c13572683b08a429c52f13f87ad..15241466ff912324489b425f85e9285d8572b9a8 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -347,7 +347,8 @@ bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Cont
     desc.fHeight = bounds.height();
     desc.fConfig = kRGBA_8888_GrPixelConfig;
 
-    SkAutoTUnref<GrTexture> dst(context->textureProvider()->createApproxTexture(desc));
+    SkAutoTUnref<GrTexture> dst(context->textureProvider()->createTexture(desc,
+                                                                      proxy->getSizeConstraint()));
     if (!dst) {
         return false;
     }
@@ -600,6 +601,15 @@ void SkImageFilter::PurgeCache() {
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
+#if SK_SUPPORT_GPU
+SkImageFilter::Proxy::Proxy(bool requireExactTextureSize)
+    : fSizeConstraint(requireExactTextureSize ? GrTextureProvider::kExact_SizeConstraint
+                                              : GrTextureProvider::kApprox_SizeConstraint)
+{}
+#else
+SkImageFilter::Proxy::Proxy(bool) {}
+#endif
+
 SkBaseDevice* SkImageFilter::DeviceProxy::createDevice(int w, int h) {
     SkBaseDevice::CreateInfo cinfo(SkImageInfo::MakeN32Premul(w, h),
                                    SkBaseDevice::kNever_TileUsage,