Revert of Add transfer buffer support.

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index c2431c764aabffbcafe6b44eebeeb638d96a4c56..637a1cf16157af0a0b95f7802f181e6525b179fc 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -16,7 +16,6 @@
 #include "GrGLRenderTarget.h"
 #include "GrGLStencilAttachment.h"
 #include "GrGLTexture.h"
-#include "GrGLTransferBuffer.h"
 #include "GrGLVertexArray.h"
 #include "GrGLVertexBuffer.h"
 #include "GrGpu.h"
@@ -102,12 +101,12 @@
     void releaseBuffer(GrGLuint id, GrGLenum type);
 
     // sizes are in bytes
-    void* mapBuffer(GrGLuint id, GrGLenum type, GrGLBufferImpl::Usage usage, size_t currentSize,
+    void* mapBuffer(GrGLuint id, GrGLenum type, bool dynamic, size_t currentSize,
                     size_t requestedSize);
 
     void unmapBuffer(GrGLuint id, GrGLenum type, void* mapPtr);
 
-    void bufferData(GrGLuint id, GrGLenum type, GrGLBufferImpl::Usage usage, size_t currentSize,
+    void bufferData(GrGLuint id, GrGLenum type, bool dynamic, size_t currentSize,
                     const void* src, size_t srcSizeInBytes);
 
     const GrGLContext* glContextForTesting() const override {
@@ -144,7 +143,6 @@
                                          const void* srcData) override;
     GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) override;
     GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) override;
-    GrTransferBuffer* onCreateTransferBuffer(size_t size, TransferType type) override;
     GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&, GrWrapOwnership) override;
     GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&,
                                               GrWrapOwnership) override;