Added minimal support to command buffer for GL_ARB_texture_rectangle

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
===================================================================
--- gpu/command_buffer/build_gles2_cmd_buffer.py	(revision 111321)
+++ gpu/command_buffer/build_gles2_cmd_buffer.py	(working copy)
@@ -225,6 +225,7 @@
 GL_APICALL void         GL_APIENTRY glPlaceholder453CHROMIUM (void);
 GL_APICALL void         GL_APIENTRY glGetTranslatedShaderSourceANGLE (GLidShader shader, GLsizeiNotNegative bufsize, GLsizei* length, char* source);
 GL_APICALL void         GL_APIENTRY glPostSubBufferCHROMIUM (GLint x, GLint y, GLint width, GLint height);
+GL_APICALL void         GL_APIENTRY glTexImageIOSurface2DCHROMIUM (GLenumTextureBindTarget target, GLsizei width, GLsizei height, GLuint ioSurfaceId, GLuint plane);
 """
 
 # This is the list of all commmands that will be generated and their Id.
@@ -435,6 +436,7 @@
   'GetProgramInfoCHROMIUM':                                    455,
   'GetTranslatedShaderSourceANGLE':                            456,
   'PostSubBufferCHROMIUM':                                     457,
+  'TexImageIOSurface2DCHROMIUM':                               458,
 }
 
 # This is a list of enum names and their valid values. It is used to map
@@ -1793,6 +1795,12 @@
     'extension': True,
     'chromium': True,
   },
+  'TexImageIOSurface2DCHROMIUM': {
+    'decoder_func': 'DoTexImageIOSurface2DCHROMIUM',
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
 }