Split drawing functionality out of GrContext and into new GrDrawContext

src/core/SkImageFilter.cpp

Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index 0a5e16e1d7a54d44640a0ff86cc5c343cb4dea42..8694fc557e66488c32538fddef2a253d83df1ca1 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -10,6 +10,7 @@
 #include "SkBitmap.h"
 #include "SkChecksum.h"
 #include "SkDevice.h"
+#include "GrDrawContext.h"
 #include "SkLazyPtr.h"
 #include "SkMatrixImageFilter.h"
 #include "SkReadBuffer.h"
@@ -276,11 +277,15 @@ bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Cont
         SkASSERT(fp);
         GrPaint paint;
         paint.addColorProcessor(fp)->unref();
-        context->drawNonAARectToRect(dst->asRenderTarget(), clip, paint, SkMatrix::I(), dstRect,
-                                     srcRect);
 
-        WrapTexture(dst, bounds.width(), bounds.height(), result);
-        return true;
+        GrDrawContext* drawContext = context->drawContext();
+        if (drawContext) {
+            drawContext->drawNonAARectToRect(dst->asRenderTarget(), clip, paint, SkMatrix::I(),
+                                             dstRect, srcRect);
+
+            WrapTexture(dst, bounds.width(), bounds.height(), result);
+            return true;
+        }
     }
 #endif
     return false;