Refactor context creation parameters into a struct.

ui/gl/init/gl_factory_win.cc

Index: ui/gl/init/gl_factory_win.cc
diff --git a/ui/gl/init/gl_factory_win.cc b/ui/gl/init/gl_factory_win.cc
index cfccb47ac3dc3aa3247a7024a1823fb62d9efc01..9a43d7ad1de775d134b0a6ac111395fd92ade1a5 100644
--- a/ui/gl/init/gl_factory_win.cc
+++ b/ui/gl/init/gl_factory_win.cc
@@ -47,18 +47,18 @@ bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
 
 scoped_refptr<GLContext> CreateGLContext(GLShareGroup* share_group,
                                          GLSurface* compatible_surface,
-                                         GpuPreference gpu_preference) {
+                                         const GLContextAttribs& attribs) {
   TRACE_EVENT0("gpu", "gl::init::CreateGLContext");
   switch (GetGLImplementation()) {
     case kGLImplementationOSMesaGL:
       return InitializeGLContext(new GLContextOSMesa(share_group),
-                                 compatible_surface, gpu_preference);
+                                 compatible_surface, attribs);
     case kGLImplementationEGLGLES2:
       return InitializeGLContext(new GLContextEGL(share_group),
-                                 compatible_surface, gpu_preference);
+                                 compatible_surface, attribs);
     case kGLImplementationDesktopGL:
       return InitializeGLContext(new GLContextWGL(share_group),
-                                 compatible_surface, gpu_preference);
+                                 compatible_surface, attribs);
     case kGLImplementationMockGL:
       return new GLContextStub(share_group);
     default: