Enable --high-dpi-support by default.

ui/gfx/win/dpi.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/win/dpi.h"
 
 #include <windows.h>
 #include "base/command_line.h"
 #include "base/win/scoped_hdc.h"
 #include "base/win/windows_version.h"
@@ skipping 127 matching lines @@
 float GetDPIScale() {
   if (IsHighDPIEnabled()) {
     return gfx::Display::HasForceDeviceScaleFactor() ?
         gfx::Display::GetForcedDeviceScaleFactor() :
         GetUnforcedDeviceScaleFactor();
   }
   return 1.0;
 }
 
 void ForceHighDPISupportForTesting(float scale) {
-  force_highdpi_for_testing = true;
   g_device_scale_factor = scale;
 }
 
 bool IsHighDPIEnabled() {
   // Flag stored in HKEY_CURRENT_USER\SOFTWARE\\Google\\Chrome\\Profile,
   // under the DWORD value high-dpi-support.
   // Default is disabled.
   static DWORD value = ReadRegistryValue(
       HKEY_CURRENT_USER, kRegistryProfilePath,
-      kHighDPISupportW, FALSE);
-  return force_highdpi_for_testing || (value == 1);
+      kHighDPISupportW, TRUE);
+  return value != 0;
 }
 
 bool IsInHighDPIMode() {
   return GetDPIScale() > 1.0;
 }
 
 void EnableHighDPISupport() {
   if (IsHighDPIEnabled() &&
       !SetProcessDpiAwarenessWrapper(PROCESS_SYSTEM_DPI_AWARE)) {
     SetProcessDPIAwareWrapper();
@@ skipping 72 matching lines @@
 
 double GetUndocumentedDPITouchScale() {
   static double scale =
       (base::win::GetVersion() < base::win::VERSION_WIN8_1) ?
       GetUndocumentedDPIScale() : 1.0;
   return scale;
 }
 
 }  // namespace win
 }  // namespace gfx