Make dynamic mock bindings initialization consistent with other GL implementations

ui/gl/gl_context_osmesa.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_context_osmesa.h"
 
 #include <GL/osmesa.h>
 
 #include "base/logging.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 65 matching lines @@
   // Track that we're no longer in a released state to workaround a mesa issue.
   is_released_ = false;
 
   // Set this as soon as the context is current, since we might call into GL.
   SetRealGLApi();
 
   // Row 0 is at the top.
   OSMesaPixelStore(OSMESA_Y_UP, 0);
 
   SetCurrent(surface);
-  if (!InitializeDynamicBindings()) {
-    return false;
-  }
+  InitializeDynamicBindings();
 
   if (!surface->OnMakeCurrent(this)) {
     LOG(ERROR) << "Could not make current.";
     return false;
   }
 
   release_current.Cancel();
   return true;
 }
 
@@ skipping 45 matching lines @@
 
 void GLContextOSMesa::OnSetSwapInterval(int interval) {
   DCHECK(IsCurrent(nullptr));
 }
 
 GLContextOSMesa::~GLContextOSMesa() {
   Destroy();
 }
 
 }  // namespace gl