Revert of Refactor context creation parameters into a struct.

ui/gl/gl_context_cgl.cc

Index: ui/gl/gl_context_cgl.cc
diff --git a/ui/gl/gl_context_cgl.cc b/ui/gl/gl_context_cgl.cc
index 2a105c4983d0fb1ee86e2e75ccf5336afbde3b44..8ad268996ab7fdd872df55cc891e9a036d34b673 100644
--- a/ui/gl/gl_context_cgl.cc
+++ b/ui/gl/gl_context_cgl.cc
@@ -91,17 +91,11 @@
 }
 
 bool GLContextCGL::Initialize(GLSurface* compatible_surface,
-                              const GLContextAttribs& attribs) {
+                              GpuPreference gpu_preference) {
   DCHECK(compatible_surface);
 
-  // webgl_compatibility_context and disabling bind_generates_resource are not
-  // supported.
-  DCHECK(!attribs.webgl_compatibility_context &&
-         attribs.bind_generates_resource);
-
-  GpuPreference gpu_preference =
-      ui::GpuSwitchingManager::GetInstance()->AdjustGpuPreference(
-          attribs.gpu_preference);
+  gpu_preference = ui::GpuSwitchingManager::GetInstance()->AdjustGpuPreference(
+      gpu_preference);
 
   GLContextCGL* share_context = share_group() ?
       static_cast<GLContextCGL*>(share_group()->GetContext()) : nullptr;