Override drawRRect in fake SkBitmapDevices.

Recent changes to SkBitmapDevice modified ::drawRRect() to take
an optimized drawing case. Some subclasses of SkBitmapDevice were
depending on the old behavior of calling ::drawPath(). Since they
do not draw, attempting to take the drawing path can cause problems.
For these subclasses, call drawPath() in the subclass.

R=reed@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/70443002

git-svn-id: http://skia.googlecode.com/svn/trunk@12247 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkDeferredCanvas.cpp b/src/utils/SkDeferredCanvas.cpp
index ce5eb5e..b94b2fe 100644
--- a/src/utils/SkDeferredCanvas.cpp
+++ b/src/utils/SkDeferredCanvas.cpp
@@ -137,6 +137,7 @@
 //-----------------------------------------------------------------------------
 // DeferredDevice
 //-----------------------------------------------------------------------------
+// FIXME: Derive from SkBaseDevice.
 class DeferredDevice : public SkBitmapDevice {
 public:
     explicit DeferredDevice(SkBaseDevice* immediateDevice);
@@ -197,6 +198,9 @@
     virtual void drawRect(const SkDraw&, const SkRect& r,
                             const SkPaint& paint) SK_OVERRIDE
         {SkASSERT(0);}
+    virtual void drawRRect(const SkDraw&, const SkRRect& rr,
+                           const SkPaint& paint) SK_OVERRIDE
+        {SkASSERT(0);}
     virtual void drawPath(const SkDraw&, const SkPath& path,
                             const SkPaint& paint,
                             const SkMatrix* prePathMatrix = NULL,