Add support for EGLImage to GrGLInterface

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 fcc02162dd03d27f55260a1bec367371d404a689..7e3031b0d37ba03816690358c026eb9526248d66 100644
--- a/include/gpu/gl/GrGLFunctions.h
+++ b/include/gpu/gl/GrGLFunctions.h
@@ -352,6 +352,11 @@ typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPushDebugGroupProc)(GrGLenum source,
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPopDebugGroupProc)();
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLObjectLabelProc)(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar *label);
 
+/** EGL functions */
+typedef const char* (GR_GL_FUNCTION_TYPE* GrEGLQueryStringProc)(GrEGLDisplay dpy, GrEGLint name);
+typedef GrEGLDisplay (GR_GL_FUNCTION_TYPE* GrEGLGetCurrentDisplayProc)();
+typedef GrEGLImageKHR (GR_GL_FUNCTION_TYPE* GrEGLCreateImageProc)(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint *attrib_list);
+typedef GrEGLBoolean (GR_GL_FUNCTION_TYPE* GrEGLDestroyImageProc)(GrEGLDisplay dpy, GrEGLImageKHR image);
 }  // extern "C"
 
 #endif