Add transfer buffer support.

src/gpu/gl/GrGLTransferBuffer.cpp

Index: src/gpu/gl/GrGLTransferBuffer.cpp
diff --git a/src/gpu/gl/GrGLIndexBuffer.cpp b/src/gpu/gl/GrGLTransferBuffer.cpp
old mode 100644
new mode 100755
similarity index 50%
copy from src/gpu/gl/GrGLIndexBuffer.cpp
copy to src/gpu/gl/GrGLTransferBuffer.cpp
index 230d9a46933ac757c2fe71662c80cda1be409be3..b7ee766d92844fee961954cfbda95ccb62be38fe
--- a/src/gpu/gl/GrGLIndexBuffer.cpp
+++ b/src/gpu/gl/GrGLTransferBuffer.cpp
@@ -1,21 +1,21 @@
 /*
- * Copyright 2011 Google Inc.
+ * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#include "GrGLIndexBuffer.h"
+#include "GrGLTransferBuffer.h"
 #include "GrGLGpu.h"
 #include "SkTraceMemoryDump.h"
 
-GrGLIndexBuffer::GrGLIndexBuffer(GrGLGpu* gpu, const Desc& desc)
-    : INHERITED(gpu, desc.fSizeInBytes, desc.fDynamic, 0 == desc.fID)
-    , fImpl(gpu, desc, GR_GL_ELEMENT_ARRAY_BUFFER) {
+GrGLTransferBuffer::GrGLTransferBuffer(GrGLGpu* gpu, const Desc& desc, GrGLenum type)
+    : INHERITED(gpu, desc.fSizeInBytes)
+    , fImpl(gpu, desc, type) {
     this->registerWithCache();
 }
 
-void GrGLIndexBuffer::onRelease() {
+void GrGLTransferBuffer::onRelease() {
     if (!this->wasDestroyed()) {
         fImpl.release(this->getGpuGL());
     }
@@ -23,12 +23,12 @@ void GrGLIndexBuffer::onRelease() {
     INHERITED::onRelease();
 }
 
-void GrGLIndexBuffer::onAbandon() {
+void GrGLTransferBuffer::onAbandon() {
     fImpl.abandon();
     INHERITED::onAbandon();
 }
 
-void* GrGLIndexBuffer::onMap() {
+void* GrGLTransferBuffer::onMap() {
     if (!this->wasDestroyed()) {
         return fImpl.map(this->getGpuGL());
     } else {
@@ -36,22 +36,14 @@ void* GrGLIndexBuffer::onMap() {
     }
 }
 
-void GrGLIndexBuffer::onUnmap() {
+void GrGLTransferBuffer::onUnmap() {
     if (!this->wasDestroyed()) {
         fImpl.unmap(this->getGpuGL());
     }
 }
 
-bool GrGLIndexBuffer::onUpdateData(const void* src, size_t srcSizeInBytes) {
-    if (!this->wasDestroyed()) {
-        return fImpl.updateData(this->getGpuGL(), src, srcSizeInBytes);
-    } else {
-        return false;
-    }
-}
-
-void GrGLIndexBuffer::setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
-                                       const SkString& dumpName) const {
+void GrGLTransferBuffer::setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
+                                          const SkString& dumpName) const {
     SkString buffer_id;
     buffer_id.appendU32(this->bufferID());
     traceMemoryDump->setMemoryBacking(dumpName.c_str(), "gl_buffer",