When cache is full delay flush until GrContext draw is finished

include/gpu/GrContext.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 859 matching lines @@
     GrResourceCache*                fTextureCache;
     GrFontCache*                    fFontCache;
 
     GrPathRendererChain*            fPathRendererChain;
     GrSoftwarePathRenderer*         fSoftwarePathRenderer;
 
     GrVertexBufferAllocPool*        fDrawBufferVBAllocPool;
     GrIndexBufferAllocPool*         fDrawBufferIBAllocPool;
     GrInOrderDrawBuffer*            fDrawBuffer;
 
+    // Set by OverbudgetCB() to request that GrContext flush before exiting a draw.
+    bool                            fFlushToReduceCacheSize;
+
     GrAARectRenderer*               fAARectRenderer;
     GrOvalRenderer*                 fOvalRenderer;
 
     bool                            fDidTestPMConversions;
     int                             fPMToUPMConversion;
     int                             fUPMToPMConversion;
 
     struct CleanUpData {
         PFCleanUpFunc fFunc;
         void*         fInfo;
     };
 
     SkTDArray<CleanUpData>          fCleanUpData;
 
     int                             fMaxTextureSizeOverride;
 
     GrContext(); // init must be called after the constructor.
     bool init(GrBackend, GrBackendContext);
 
     void setupDrawBuffer();
 
     class AutoRestoreEffects;
+    class AutoCheckFlush;
     /// Sets the paint and returns the target to draw into. The paint can be NULL in which case the
     /// draw state is left unmodified.
-    GrDrawTarget* prepareToDraw(const GrPaint*, BufferedDraw, AutoRestoreEffects*);
+    GrDrawTarget* prepareToDraw(const GrPaint*, BufferedDraw, AutoRestoreEffects*, AutoCheckFlush*);
 
     void internalDrawPath(GrDrawTarget* target, bool useAA, const SkPath& path,
                           const SkStrokeRec& stroke);
 
     GrTexture* createResizedTexture(const GrTextureDesc& desc,
                                     const GrCacheID& cacheID,
                                     void* srcData,
                                     size_t rowBytes,
                                     bool filter);
 
@@ skipping 106 matching lines @@
     }
 
     GrTexture* texture() { return fTexture; }
 
 private:
     GrContext*                    fContext;
     GrTexture*                    fTexture;
 };
 
 #endif