Refactor context creation parameters into a struct.

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"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gl {
 
 GLContextOSMesa::GLContextOSMesa(GLShareGroup* share_group)
     : GLContextReal(share_group),
       context_(nullptr),
       is_released_(false) {
 }
 
 bool GLContextOSMesa::Initialize(GLSurface* compatible_surface,
-                                 GpuPreference gpu_preference) {
+                                 const GLContextAttribs& attribs) {
+  // webgl_compatibility_context and disabling bind_generates_resource are not
+  // supported.
+  DCHECK(!attribs.webgl_compatibility_context &&
+         attribs.bind_generates_resource);
+
   DCHECK(!context_);
 
   OSMesaContext share_handle = static_cast<OSMesaContext>(
       share_group() ? share_group()->GetHandle() : nullptr);
 
   GLuint format = 0;
   switch (compatible_surface->GetFormat()) {
     case GLSurface::SURFACE_OSMESA_BGRA:
       format = OSMESA_BGRA;
       break;
@@ skipping 108 matching lines @@
 
 void GLContextOSMesa::OnSetSwapInterval(int interval) {
   DCHECK(IsCurrent(nullptr));
 }
 
 GLContextOSMesa::~GLContextOSMesa() {
   Destroy();
 }
 
 }  // namespace gl