GrResourceCache2 manages scratch texture.

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 285a73745cf94392e1abda6605b65d1f4bc99d1c..fe03e32f733a3d17fd2de42cb6c51de666a88888 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -34,8 +34,7 @@ class SK_API SkGpuDevice : public SkBaseDevice {
 public:
     enum Flags {
         kNeedClear_Flag = 1 << 0,  //!< Surface requires an initial clear
-        kCached_Flag    = 1 << 1,  //!< Surface is cached and needs to be unlocked when released
-        kDFFonts_Flag   = 1 << 2,  //!< Surface should render fonts using signed distance fields
+        kDFFonts_Flag   = 1 << 1,  //!< Surface should render fonts using signed distance fields
     };
 
     /**
@@ -117,9 +116,6 @@ public:
                              const SkImageFilter::Context&,
                              SkBitmap*, SkIPoint*) SK_OVERRIDE;
 
-    class SkAutoCachedTexture; // used internally
-
-
 protected:
     virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) SK_OVERRIDE;
     virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;