Add optional data parameter to createBuffer

src/gpu/GrResourceProvider.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrResourceProvider_DEFINED
 #define GrResourceProvider_DEFINED
 
@@ skipping 92 matching lines @@
         kNoPendingIO_Flag = kNoPendingIO_ScratchTextureFlag,
     };
 
     /**
      * Returns a buffer.
      *
      * @param size            minimum size of buffer to return.
      * @param intendedType    hint to the graphics subsystem about what the buffer will be used for.
      * @param GrAccessPattern hint to the graphics subsystem about how the data will be accessed.
      * @param flags           see Flags enum.
+     * @param data            optional data with which to initialize the buffer.
      *
      * @return the buffer if successful, otherwise nullptr.
      */
-    GrBuffer* createBuffer(size_t size, GrBufferType intendedType, GrAccessPattern, uint32_t flags);
+    GrBuffer* createBuffer(size_t size, GrBufferType intendedType, GrAccessPattern, uint32_t flags,
+                           const void* data = nullptr);
 
     GrTexture* createApproxTexture(const GrSurfaceDesc& desc, uint32_t flags) {
         SkASSERT(0 == flags || kNoPendingIO_Flag == flags);
         return this->internalCreateApproxTexture(desc, flags);
     }
 
     /**  Returns a GrBatchAtlas. This function can be called anywhere, but the returned atlas should
      *   only be used inside of GrBatch::generateGeometry
      *   @param GrPixelConfig    The pixel config which this atlas will store
      *   @param width            width in pixels of the atlas
@@ skipping 39 matching lines @@
                                                const GrUniqueKey& key);
 
     const GrBuffer* createQuadIndexBuffer();
 
     GrUniqueKey fQuadIndexBufferKey;
 
     typedef GrTextureProvider INHERITED;
 };
 
 #endif