Refactor GrBufferAllocPools to use resource cache

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index 10e100f8aa853c695fc44028902dfec83306d4f9..9ad20e53e41f3d123b3249f4832c760201109b78 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -185,6 +185,7 @@ public:
     // recycled in the texture cache. This is to prevent ghosting by drivers
     // (in particular for deferred architectures).
     bool reuseScratchTextures() const { return fReuseScratchTextures; }
+    bool reuseScratchBuffers() const { return fReuseScratchBuffers; }
 
     int maxRenderTargetSize() const { return fMaxRenderTargetSize; }
     int maxTextureSize() const { return fMaxTextureSize; }
@@ -229,10 +230,12 @@ protected:
     bool fStencilWrapOpsSupport                      : 1;
     bool fDiscardRenderTargetSupport                 : 1;
     bool fReuseScratchTextures                       : 1;
+    bool fReuseScratchBuffers                        : 1;
     bool fGpuTracingSupport                          : 1;
     bool fCompressedTexSubImageSupport               : 1;
     bool fOversizedStencilSupport                    : 1;
     bool fTextureBarrierSupport                      : 1;
+
     // Driver workaround
     bool fUseDrawInsteadOfClear                      : 1;
     bool fUseDrawInsteadOfPartialRenderTargetWrite   : 1;