Consolidate GPU buffer implementations

src/gpu/gl/GrGLDefines.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
 #ifndef GrGLDefines_DEFINED
@@ skipping 104 matching lines @@
 #define GR_GL_DRAW_INDIRECT_BUFFER_BINDING   0x8F43
 #define GR_GL_PIXEL_PACK_BUFFER              0x88EB
 #define GR_GL_PIXEL_UNPACK_BUFFER            0x88EC
 
 #define GR_GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM 0x78EC 
 #define GR_GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM   0x78ED
 
 #define GR_GL_STREAM_DRAW                    0x88E0
 #define GR_GL_STREAM_READ                    0x88E1
 #define GR_GL_STATIC_DRAW                    0x88E4
+#define GR_GL_STATIC_READ                    0x88E5
 #define GR_GL_DYNAMIC_DRAW                   0x88E8
+#define GR_GL_DYNAMIC_READ                   0x88E9
 
 #define GR_GL_BUFFER_SIZE                    0x8764
 #define GR_GL_BUFFER_USAGE                   0x8765
 
 #define GR_GL_CURRENT_VERTEX_ATTRIB          0x8626
 
 /* CullFaceMode */
 #define GR_GL_FRONT                          0x0404
 #define GR_GL_BACK                           0x0405
 #define GR_GL_FRONT_AND_BACK                 0x0408
@@ skipping 828 matching lines @@
 #define GR_EGL_EXTENSIONS                                   0x3055
 #define GR_EGL_GL_TEXTURE_2D                                0x30B1
 #define GR_EGL_GL_TEXTURE_LEVEL                             0x30BC
 #define GR_EGL_IMAGE_PRESERVED                              0x30D2
 #define GR_EGL_FALSE                                        0x0
 #define GR_EGL_TRUE                                         0x1
 #define GR_EGL_NONE                                         0x3038
 #define GR_EGL_NO_IMAGE                                    ((GrEGLImage)0)
 
 #endif