Add GL_CHROMIUM_map_sub functions to GrGLInterface and bit to GrGLCaps.

include/gpu/gl/GrGLFunctions.h

Index: include/gpu/gl/GrGLFunctions.h
diff --git a/include/gpu/gl/GrGLFunctions.h b/include/gpu/gl/GrGLFunctions.h
index 532c19c42ea92e83e35d82d3ff2eae7d7242ace7..a6bfd4a36d9f742cc3f71eac0c2b81271b4f84ff 100644
--- a/include/gpu/gl/GrGLFunctions.h
+++ b/include/gpu/gl/GrGLFunctions.h
@@ -150,6 +150,8 @@ extern "C" {
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLLineWidthProc)(GrGLfloat width);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLLinkProgramProc)(GrGLuint program);
     typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapBufferProc)(GrGLenum target, GrGLenum access);
+    typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapBufferSubDataProc)(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access);
+    typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPixelStoreiProc)(GrGLenum pname, GrGLint param);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPopGroupMarkerProc)();
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPushGroupMarkerProc)(GrGLsizei length, const char* marker);
@@ -202,6 +204,8 @@ extern "C" {
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformMatrix3fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformMatrix4fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
     typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLUnmapBufferProc)(GrGLenum target);
+    typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUnmapBufferSubDataProc)(const GrGLvoid* mem);
+    typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUnmapTexSubImage2DProc)(const GrGLvoid* mem);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUseProgramProc)(GrGLuint program);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttrib4fvProc)(GrGLuint indx, const GrGLfloat* values);
     typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttribPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);