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

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index be6c577f5b727c00e98b7c388d770d328b762ffb..ffcce6d19d88551d36dd66396856206212901542 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -309,12 +309,20 @@ void Layer::SetColor(SkColor color) {
 bool Layer::SchedulePaint(const gfx::Rect& invalid_rect) {
   if (type_ == LAYER_SOLID_COLOR || !delegate_)
     return false;
-  gfx::Rect invalid_rect_in_pixel = ConvertRectToPixel(this, invalid_rect);
-  damaged_region_.op(invalid_rect_in_pixel.x(),
-                     invalid_rect_in_pixel.y(),
-                     invalid_rect_in_pixel.right(),
-                     invalid_rect_in_pixel.bottom(),
-                     SkRegion::kUnion_Op);
+  if (web_layer_is_accelerated_) {

[oshima, 2012/05/09 21:11:58]

DCHECK(texture_);

Please add comment + TODO

+    damaged_region_.op(invalid_rect.x(),
+                       invalid_rect.y(),
+                       invalid_rect.right(),
+                       invalid_rect.bottom(),
+                       SkRegion::kUnion_Op);
+  } else {
+    gfx::Rect invalid_rect_in_pixel = ConvertRectToPixel(this, invalid_rect);
+    damaged_region_.op(invalid_rect_in_pixel.x(),
+                       invalid_rect_in_pixel.y(),
+                       invalid_rect_in_pixel.right(),
+                       invalid_rect_in_pixel.bottom(),
+                       SkRegion::kUnion_Op);
+  }
   ScheduleDraw();
   return true;
 }
@@ -556,6 +564,10 @@ void Layer::RecomputeTransform() {
                               0, 0, 1);
     transform.ConcatTransform(transform_);
     transform.ConcatTranslate(bounds_.x(), bounds_.y());
+
+    if (texture_)
+      transform.ConcatScale(device_scale_factor_, device_scale_factor_);
+
     transform.ConcatTransform(scale_translate);
     web_layer_.setTransform(transform.matrix());
   } else {