Refactor context creation parameters into a struct.

ui/gl/gl_context.h

Index: ui/gl/gl_context.h
diff --git a/ui/gl/gl_context.h b/ui/gl/gl_context.h
index ebc98faa88667c0317ab0bcb8f8bf107d3458b3d..542940c7683894bb857e311f97bbb53cf0102583 100644
--- a/ui/gl/gl_context.h
+++ b/ui/gl/gl_context.h
@@ -33,6 +33,12 @@ class GPUTiming;
 class GPUTimingClient;
 struct GLVersionInfo;
 
+struct GLContextAttribs {
+  GpuPreference gpu_preference = PreferIntegratedGpu;
+  bool bind_generates_resource = true;
+  bool webgl_compatibility_context = false;
+};
+
 // Encapsulates an OpenGL context, hiding platform specific management.
 class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
  public:
@@ -42,8 +48,8 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   // context can be made with other surface's of the same type. The compatible
   // surface is only needed for certain platforms like WGL, OSMesa and GLX. It
   // should be specific for all platforms though.
-  virtual bool Initialize(
-      GLSurface* compatible_surface, GpuPreference gpu_preference) = 0;
+  virtual bool Initialize(GLSurface* compatible_surface,
+                          const GLContextAttribs& attribs) = 0;
 
   // Makes the GL context and a surface current on the current thread.
   virtual bool MakeCurrent(GLSurface* surface) = 0;
@@ -199,7 +205,7 @@ class GL_EXPORT GLContextReal : public GLContext {
 GL_EXPORT scoped_refptr<GLContext> InitializeGLContext(
     scoped_refptr<GLContext> context,
     GLSurface* compatible_surface,
-    GpuPreference gpu_preference);
+    const GLContextAttribs& attribs);
 
 }  // namespace gl