Add ability to set resolution on external display

chrome/browser/chromeos/display/display_preferences_unittest.cc

Index: chrome/browser/chromeos/display/display_preferences_unittest.cc
diff --git a/chrome/browser/chromeos/display/display_preferences_unittest.cc b/chrome/browser/chromeos/display/display_preferences_unittest.cc
index 023cfdf34bb660c6fea8e27c5bee7391f06d8b5a..a079a3d37d7f49b7c5ffa3688e51258447983356 100644
--- a/chrome/browser/chromeos/display/display_preferences_unittest.cc
+++ b/chrome/browser/chromeos/display/display_preferences_unittest.cc
@@ -183,7 +183,7 @@ TEST_F(DisplayPreferencesTest, BasicStores) {
   ash::internal::DisplayManager* display_manager =
       ash::Shell::GetInstance()->display_manager();
 
-  UpdateDisplay("200x200*2,200x200");
+  UpdateDisplay("300x200*2,400x300");
   int64 id1 = gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().id();
   gfx::Display::SetInternalDisplayId(id1);
   int64 id2 = ash::ScreenAsh::GetSecondaryDisplay().id();
@@ -231,6 +231,10 @@ TEST_F(DisplayPreferencesTest, BasicStores) {
   EXPECT_EQ(1, rotation);
   EXPECT_EQ(1250, ui_scale);
 
+  int width = 0, height = 0;
+  EXPECT_FALSE(property->GetInteger("width", &width));
+  EXPECT_FALSE(property->GetInteger("height", &height));
+
   int top = 0, left = 0, bottom = 0, right = 0;
   EXPECT_TRUE(property->GetInteger("insets_top", &top));
   EXPECT_TRUE(property->GetInteger("insets_left", &left));