Consolidate GPU buffer implementations

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index b806dcbabc67aba5d589ce1cc6bd7c88453d539c..9be5fc9793de1a8e75065c3328e721092911aa1c 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -244,9 +244,9 @@ public:
         return fDrawPathMasksToCompressedTextureSupport;
     }
 
-    size_t geometryBufferMapThreshold() const {
-        SkASSERT(fGeometryBufferMapThreshold >= 0);
-        return fGeometryBufferMapThreshold;
+    size_t bufferMapThreshold() const {
+        SkASSERT(fBufferMapThreshold >= 0);
+        return fBufferMapThreshold;
     }
 
     bool supportsInstancedDraws() const {
@@ -298,7 +298,7 @@ protected:
     GR_STATIC_ASSERT(kLast_GrBlendEquation < 32);
 
     uint32_t fMapBufferFlags;
-    int fGeometryBufferMapThreshold;
+    int fBufferMapThreshold;
 
     int fMaxRenderTargetSize;
     int fMaxTextureSize;