Implement support for a Context parameter in image filters

src/effects/SkBicubicImageFilter.cpp

Index: src/effects/SkBicubicImageFilter.cpp
diff --git a/src/effects/SkBicubicImageFilter.cpp b/src/effects/SkBicubicImageFilter.cpp
index acf48f04dea13d8caf3619b781913bc6ea4c2edc..eabf066c7df940e417b6380c06655d4a6e6f4d46 100644
--- a/src/effects/SkBicubicImageFilter.cpp
+++ b/src/effects/SkBicubicImageFilter.cpp
@@ -82,12 +82,12 @@ inline SkPMColor cubicBlend(const SkScalar c[16], SkScalar t, SkPMColor c0, SkPM
 
 bool SkBicubicImageFilter::onFilterImage(Proxy* proxy,
                                          const SkBitmap& source,
-                                         const SkMatrix& matrix,
+                                         const Context& ctx,
                                          SkBitmap* result,
                                          SkIPoint* offset) const {
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, &srcOffset)) {
+    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }
 
@@ -168,10 +168,10 @@ bool SkBicubicImageFilter::onFilterImage(Proxy* proxy,
 
 #if SK_SUPPORT_GPU
 
-bool SkBicubicImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+bool SkBicubicImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                           SkBitmap* result, SkIPoint* offset) const {
     SkBitmap srcBM = src;
-    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctm, &srcBM, offset)) {
+    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &srcBM, offset)) {
         return false;
     }
     GrTexture* srcTexture = srcBM.getTexture();