Take budgeted param when snapping new image.

Review URL: https://codereview.chromium.org/872543002
diff --git a/src/image/SkSurface_Gpu.h b/src/image/SkSurface_Gpu.h
index f87c5d7..90c00c4 100644
--- a/src/image/SkSurface_Gpu.h
+++ b/src/image/SkSurface_Gpu.h
@@ -23,7 +23,7 @@
 
     SkCanvas* onNewCanvas() SK_OVERRIDE;
     SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
-    SkImage* onNewImageSnapshot() SK_OVERRIDE;
+    SkImage* onNewImageSnapshot(Budgeted) SK_OVERRIDE;
     virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
                         const SkPaint*) SK_OVERRIDE;
     void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;