Zoom the web contents 2x such that they are blurry in High DPI

ui/compositor/layer.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/layer.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 539 matching lines @@
                                     0, device_scale_factor_, 0,
                                     0, 0, 1);
     // Start with the inverse matrix of above.
     Transform transform;
     transform.matrix().set3x3(1.0f / device_scale_factor_, 0, 0,
                               0, 1.0f / device_scale_factor_, 0,
                               0, 0, 1);
     transform.ConcatTransform(transform_);
     transform.ConcatTranslate(bounds_.x(), bounds_.y());
     transform.ConcatTransform(scale_translate);
+
+    if (texture_)
+      transform.ConcatScale(device_scale_factor_, device_scale_factor_);

[oshima, 2012/05/09 19:57:21]

move this before ConcatTransform(scale_translate);
and put behind IsDIPEnabled() just in case.

Please file a bug and add comment why we're doing this now and TODO to remove
this. (or you can use the exiting one for converting renderer to use DIP)

+
     web_layer_.setTransform(transform.matrix());
   } else {
     Transform t = transform_;
     t.ConcatTranslate(bounds_.x(), bounds_.y());
     web_layer_.setTransform(t.matrix());
   }
 }
 
 void Layer::RecomputeDrawsContentAndUVRect() {
   DCHECK(!web_layer_.isNull());
@@ skipping 27 matching lines @@
     return;
   unsigned int color = 0xFF000000;
   color |= web_layer_is_accelerated_ ? 0x0000FF00 : 0x00FF0000;
   bool opaque = fills_bounds_opaquely_ && (GetCombinedOpacity() == 1.f);
   if (!opaque)
     color |= 0xFF;
   web_layer_.setDebugBorderColor(color);
 }
 
 }  // namespace ui