gpu: Add async upload functions.

gpu/command_buffer/cmd_buffer_functions.txt

Index: gpu/command_buffer/cmd_buffer_functions.txt
diff --git a/gpu/command_buffer/cmd_buffer_functions.txt b/gpu/command_buffer/cmd_buffer_functions.txt
index a91f8dba996574f1e82c40c00e2842fa6d5f1ad7..8c3c53375de3f8687e795be567f28c0799918379 100644
--- a/gpu/command_buffer/cmd_buffer_functions.txt
+++ b/gpu/command_buffer/cmd_buffer_functions.txt
@@ -203,3 +203,5 @@ GL_APICALL void         GL_APIENTRY glBindTexImage2DCHROMIUM (GLenumTextureBindT
 GL_APICALL void         GL_APIENTRY glReleaseTexImage2DCHROMIUM (GLenumTextureBindTarget target, GLint imageId);
 GL_APICALL void         GL_APIENTRY glTraceBeginCHROMIUM (const char* name);
 GL_APICALL void         GL_APIENTRY glTraceEndCHROMIUM (void);
+GL_APICALL GLboolean    GL_APIENTRY glAsyncTexSubImage2DCHROMIUM (GLenumTextureTarget target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenumTextureFormat format, GLenumPixelType type, const void* data);
+GL_APICALL GLboolean    GL_APIENTRY glAsyncTexImage2DCHROMIUM (GLenumTextureTarget target, GLint level, GLintTextureInternalFormat internalformat, GLsizei width, GLsizei height, GLintTextureBorder border, GLenumTextureFormat format, GLenumPixelType type, const void* pixels);