gpu: Add support for GLX_EXT_texture_from_pixmap extension.

third_party/khronos/GLES2/gl2ext.h

Index: third_party/khronos/GLES2/gl2ext.h
diff --git a/third_party/khronos/GLES2/gl2ext.h b/third_party/khronos/GLES2/gl2ext.h
index fee11921163526b1ed458ed56cfc8245cfea9809..a452f3f513b589b3baad30493d7c7c8d388479e3 100644
--- a/third_party/khronos/GLES2/gl2ext.h
+++ b/third_party/khronos/GLES2/gl2ext.h
@@ -2037,6 +2037,22 @@ typedef void (GL_APIENTRYP PFNGLBINDUNIFORMLOCATIONCHROMIUM) (GLuint program, GL
 #endif
 #endif
 
+/* GL_CHROMIUM_texture_from_image */
+#ifndef GL_CHROMIUM_texture_from_image
+#define GL_CHROMIUM_texture_from_image 1
+#ifdef GL_GLEXT_PROTOTYPES
+#define glBindTexImage2DCHROMIUM GLES2_GET_FUN(BindTexImage2DCHROMIUM)
+#define glReleaseTexImage2DCHROMIUM GLES2_GET_FUN(ReleaseTexImage2DCHROMIUM)
+#if !defined(GLES2_USE_CPP_BINDINGS)
+GL_APICALL void GL_APIENTRY glBindTexImage2DCHROMIUM (GLenum target, GLint imageId);
+GL_APICALL void GL_APIENTRY glReleaseTexImage2DCHROMIUM (GLenum target, GLint imageId);
+#endif
+#else
+typedef void (GL_APIENTRYP PFNGLBINDTEXIMAGE2DCHROMIUM) (GLenum target, GLint imageId);
+typedef void (GL_APIENTRYP PFNGLRELEASETEXIMAGE2DCHROMIUM) (GLenum target, GLint imageId);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif