add applyFilter() to SkImage

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 4952ae25811378f19178585dcd3708b2dfdc7f25..6914963cb9e1fc738f71773af60ffb7fc7759849 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1300,7 +1300,7 @@ void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y,
         SkImageFilter* filter = paint->getImageFilter();
         SkIPoint pos = { x - iter.getX(), y - iter.getY() };
         if (filter && !dstDev->canHandleImageFilter(filter)) {
-            SkImageFilter::Proxy proxy(dstDev);
+            SkImageFilter::DeviceProxy proxy(dstDev);
             SkBitmap dst;
             SkIPoint offset = SkIPoint::Make(0, 0);
             const SkBitmap& src = srcDev->accessBitmap(false);
@@ -1352,7 +1352,7 @@ void SkCanvas::onDrawSprite(const SkBitmap& bitmap, int x, int y, const SkPaint*
         SkImageFilter* filter = paint->getImageFilter();
         SkIPoint pos = { x - iter.getX(), y - iter.getY() };
         if (filter && !iter.fDevice->canHandleImageFilter(filter)) {
-            SkImageFilter::Proxy proxy(iter.fDevice);
+            SkImageFilter::DeviceProxy proxy(iter.fDevice);
             SkBitmap dst;
             SkIPoint offset = SkIPoint::Make(0, 0);
             SkMatrix matrix = *iter.fMatrix;