Revert of Support using OpenGL ES context on desktop

src/gpu/gl/mesa/SkMesaGLContext.cpp

Index: src/gpu/gl/mesa/SkMesaGLContext.cpp
diff --git a/src/gpu/gl/mesa/SkMesaGLContext.cpp b/src/gpu/gl/mesa/SkMesaGLContext.cpp
index 58e325dfeb82745d2ede8e4f2093e3f385ffe611..0199d12c1964e3efa067705a816a215d3e93cfa8 100644
--- a/src/gpu/gl/mesa/SkMesaGLContext.cpp
+++ b/src/gpu/gl/mesa/SkMesaGLContext.cpp
@@ -53,11 +53,7 @@
 
 static const GrGLint gBOGUS_SIZE = 16;
 
-const GrGLInterface* SkMesaGLContext::createGLContext(GrGLStandard forcedGpuAPI) {
-    if (kGLES_GrGLStandard == forcedGpuAPI) {
-        return NULL;
-    }
-
+const GrGLInterface* SkMesaGLContext::createGLContext() {
     /* Create an RGBA-mode context */
 #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
     /* specify Z, stencil, accum sizes */