Revert of Get gpudft support working in dm, gm, nanobench and bench_pictures

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 6bba97434a3b0a299f6db29fbb5471f1d903394d..6a68eeb33e6c32d59ace76c10dc684652f4267b5 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -34,7 +34,7 @@
 public:
     enum Flags {
         kNeedClear_Flag = 1 << 0,  //!< Surface requires an initial clear
-        kDFText_Flag   = 1 << 1,  //!< Surface should render text using signed distance fields
+        kDFFonts_Flag   = 1 << 1,  //!< Surface should render fonts using signed distance fields
     };
 
     /**
@@ -136,8 +136,8 @@
     GrTextContext*  fTextContext;
 
     // state for our render-target
-    GrRenderTarget* fRenderTarget;
-    uint32_t        fFlags;
+    GrRenderTarget*     fRenderTarget;
+    bool                fNeedClear;
 
     // remove when our clients don't rely on accessBitmap()
     SkBitmap fLegacyBitmap;