Fix code around display overscan settings.

ui/gfx/display.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/gfx/display.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
@@ skipping 90 matching lines @@
 #else
       gfx::Rect(bounds_.origin(), size_in_pixel));
 #endif
 }
 
 void Display::UpdateWorkAreaFromInsets(const gfx::Insets& insets) {
   work_area_ = bounds_;
   work_area_.Inset(insets);
 }
 
+void Display::SetOverscanInsets(const gfx::Insets& insets) {
+  Rect bounds_in_pixel(bounds_in_pixel_);
+  bounds_in_pixel.Inset(overscan_insets_.Scale(device_scale_factor_).Scale(-1));
+  bounds_in_pixel.Inset(insets.Scale(device_scale_factor_));
+  SetScaleAndBounds(device_scale_factor_, bounds_in_pixel);

[oshima, 2012/10/16 22:46:26]

this updates bounds_in_pixel, so it will keep shrinking as you call.

+  overscan_insets_ = insets;
+}
+
 gfx::Size Display::GetSizeInPixel() const {
   return gfx::ToFlooredSize(size().Scale(device_scale_factor_));
 }
 
 std::string Display::ToString() const {
   return base::StringPrintf("Display[%lld] bounds=%s, workarea=%s, scale=%f",
                             static_cast<long long int>(id_),
                             bounds_.ToString().c_str(),
                             work_area_.ToString().c_str(),
                             device_scale_factor_);
 }
 
 }  // namespace gfx