Refactor context creation parameters into a struct.

gpu/command_buffer/service/gl_context_virtual.cc

Index: gpu/command_buffer/service/gl_context_virtual.cc
diff --git a/gpu/command_buffer/service/gl_context_virtual.cc b/gpu/command_buffer/service/gl_context_virtual.cc
index 6b763b6c55f1345d9da2178b373e6406ec5a0fee..0a151f71997ee3930151899409fba621ab4d0a14 100644
--- a/gpu/command_buffer/service/gl_context_virtual.cc
+++ b/gpu/command_buffer/service/gl_context_virtual.cc
@@ -23,7 +23,7 @@ GLContextVirtual::GLContextVirtual(gl::GLShareGroup* share_group,
       decoder_(decoder) {}
 
 bool GLContextVirtual::Initialize(gl::GLSurface* compatible_surface,
-                                  gl::GpuPreference gpu_preference) {
+                                  const gl::GLContextAttribs& attribs) {
   SetGLStateRestorer(new GLStateRestorerImpl(decoder_));
   return shared_context_->MakeVirtuallyCurrent(this, compatible_surface);
 }