Fix high-DPI on Windows to make use of DIP scaling in WebKit.

ui/gfx/screen_win.cc

Index: ui/gfx/screen_win.cc
diff --git a/ui/gfx/screen_win.cc b/ui/gfx/screen_win.cc
index 9b33c6b20024f5154671e19c4e3202ef20917952..c6fca87a02b137a886a49996bc933521dc2e8c05 100644
--- a/ui/gfx/screen_win.cc
+++ b/ui/gfx/screen_win.cc
@@ -36,7 +36,11 @@ ScreenWin::~ScreenWin() {
 }
 
 bool ScreenWin::IsDIPEnabled() {
+#if defined(ENABLE_HIDPI)
+  return true;
+#else
   return false;
+#endif
 }
 
 gfx::Point ScreenWin::GetCursorScreenPoint() {
@@ -85,8 +89,10 @@ gfx::Display ScreenWin::GetPrimaryDisplay() const {
   MONITORINFO mi = GetMonitorInfoForMonitor(
       MonitorFromWindow(NULL, MONITOR_DEFAULTTOPRIMARY));
   gfx::Display display = GetDisplay(mi);
+#if !defined(ENABLE_HIDPI)
   DCHECK_EQ(GetSystemMetrics(SM_CXSCREEN), display.size().width());
   DCHECK_EQ(GetSystemMetrics(SM_CYSCREEN), display.size().height());
+#endif
   return display;
 }