Roll skia to r2034 (and add new gl bindings)

gpu/command_buffer/common/gl_mock.h

Index: gpu/command_buffer/common/gl_mock.h
===================================================================
--- gpu/command_buffer/common/gl_mock.h	(revision 95237)
+++ gpu/command_buffer/common/gl_mock.h	(working copy)
@@ -135,6 +135,10 @@
 
   MOCK_METHOD3(DrawArrays, void(GLenum mode, GLint first, GLsizei count));
 
+  MOCK_METHOD1(DrawBuffer, void(GLenum mode));
+
+  MOCK_METHOD2(DrawBuffersARB, void(GLsizei n, const GLenum* bufs));
+
   MOCK_METHOD4(DrawElements, void(
       GLenum mode, GLsizei count, GLenum type, const void* indices));
 
@@ -272,6 +276,8 @@
 
   MOCK_METHOD2(PolygonOffset, void(GLfloat factor, GLfloat units));
 
+  MOCK_METHOD1(ReadBuffer, void(GLenum src));
+
   MOCK_METHOD7(ReadPixels, void(
       GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
       GLenum type, void* pixels));