Revert of Consolidate GPU buffer implementations

include/gpu/GrTypesPriv.h

Index: include/gpu/GrTypesPriv.h
diff --git a/include/gpu/GrTypesPriv.h b/include/gpu/GrTypesPriv.h
index bf8ea4906352ed9c98c2ed8e3cb37594337e47a6..a2facfa6cfc0f2c65d95fda4c96646323e68a202 100644
--- a/include/gpu/GrTypesPriv.h
+++ b/include/gpu/GrTypesPriv.h
@@ -401,29 +401,13 @@
 };
 
 /**
-* Indicates the type of data that a GPU buffer will be used for.
-*/
-enum GrBufferType {
-    kVertex_GrBufferType,
-    kIndex_GrBufferType,
-    kXferCpuToGpu_GrBufferType,
-    kXferGpuToCpu_GrBufferType,
-
-    kLast_GrBufferType = kXferGpuToCpu_GrBufferType
-};
-
-/**
-* Provides a performance hint regarding the frequency at which a data store will be accessed.
-*/
-enum GrAccessPattern {
-    /** Data store will be respecified repeatedly and used many times. */
-    kDynamic_GrAccessPattern,
-    /** Data store will be specified once and used many times. (Thus disqualified from caching.) */
-    kStatic_GrAccessPattern,
-    /** Data store will be specified once and used at most a few times. (Also can't be cached.) */
-    kStream_GrAccessPattern,
-
-    kLast_GrAccessPattern = kStream_GrAccessPattern
+ * Indicates the transfer direction for a transfer buffer
+ */
+enum TransferType {
+    /** Caller intends to use the buffer to transfer data to the GPU */
+    kCpuToGpu_TransferType,
+    /** Caller intends to use the buffer to transfer data from the GPU */
+    kGpuToCpu_TransferType
 };