Fix code around display overscan settings.

ui/gfx/display_unittest.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 "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/insets.h"
 
 namespace {
@@ skipping 28 matching lines @@
   display.SetScaleAndBounds(2.0f, gfx::Rect(0, 0, 140, 140));
   EXPECT_EQ("0,0 70x70", display.bounds().ToString());
   EXPECT_EQ("10,10 50x50", display.work_area().ToString());
 
   // Scale it back to 1x
   display.SetScaleAndBounds(1.0f, gfx::Rect(0, 0, 100, 100));
   EXPECT_EQ("0,0 100x100", display.bounds().ToString());
   EXPECT_EQ("10,10 80x80", display.work_area().ToString());
 }
 
+TEST(DisplayTest, OverscanInsets) {
+  gfx::Display display(0, gfx::Rect(0, 0, 100, 100));
+  display.SetOverscanInsets(gfx::Insets(3, 4, 5, 6));
+  EXPECT_EQ("4,3 90x92", display.bounds_in_pixel().ToString());
+  display.SetOverscanInsets(gfx::Insets(6, 5, 4, 3));
+  EXPECT_EQ("5,6 92x90", display.bounds_in_pixel().ToString());
+
+  gfx::Display hidpi_display(0, gfx::Rect(0, 0, 100, 100));
+  hidpi_display.set_device_scale_factor(2.0f);
+  hidpi_display.SetOverscanInsets(gfx::Insets(3, 4, 5, 6));
+  EXPECT_EQ("8,6 80x84", hidpi_display.bounds_in_pixel().ToString());
+  hidpi_display.SetOverscanInsets(gfx::Insets(6, 5, 4, 3));
+  EXPECT_EQ("10,12 84x80", hidpi_display.bounds_in_pixel().ToString());
 }
+
+}