Remove ui-enable-dip option

ui/compositor/compositor.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/compositor/compositor.h"
 
 #include "base/command_line.h"
 #include "base/threading/thread_restrictions.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositor.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebFloatPoint.h"
@@ skipping 224 matching lines @@
 }
 
 void Compositor::SetScaleAndSize(float scale, const gfx::Size& size_in_pixel) {
   DCHECK(scale > 0);
   if (size_in_pixel.IsEmpty() || scale <= 0)
     return;
   size_ = size_in_pixel;
   host_.setViewportSize(size_in_pixel);
   root_web_layer_.setBounds(size_in_pixel);
 
-  if (device_scale_factor_ != scale && IsDIPEnabled()) {
+  if (device_scale_factor_ != scale) {
     device_scale_factor_ = scale;
     if (root_layer_)
       root_layer_->OnDeviceScaleFactorChanged(scale);
   }
 }
 
 void Compositor::AddObserver(CompositorObserver* observer) {
   observer_list_.AddObserver(observer);
 }
 
@@ skipping 100 matching lines @@
 
 COMPOSITOR_EXPORT void DisableTestCompositor() {
   test_compositor_enabled = false;
 }
 
 COMPOSITOR_EXPORT bool IsTestCompositorEnabled() {
   return test_compositor_enabled;
 }
 
 }  // namespace ui