Disable win/ash on high dpi screens

chrome/browser/ui/toolbar/wrench_menu_model.cc

Index: chrome/browser/ui/toolbar/wrench_menu_model.cc
diff --git a/chrome/browser/ui/toolbar/wrench_menu_model.cc b/chrome/browser/ui/toolbar/wrench_menu_model.cc
index e713bca7a86fc34e0357806db15d9232841aa9e7..6d46988b29e48564e079aeab9496366d217e2dd7 100644
--- a/chrome/browser/ui/toolbar/wrench_menu_model.cc
+++ b/chrome/browser/ui/toolbar/wrench_menu_model.cc
@@ -65,6 +65,7 @@
 #include "chrome/browser/enumerate_modules_model_win.h"
 #include "chrome/browser/ui/metro_pin_tab_helper_win.h"
 #include "content/public/browser/gpu_data_manager.h"
+#include "ui/gfx/win/dpi.h"
 #include "win8/util/win8_util.h"
 #endif
 
@@ -538,7 +539,10 @@ void WrenchMenuModel::Build(bool is_new_menu) {
 
 #if defined(USE_AURA)
  if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
-     content::GpuDataManager::GetInstance()->CanUseGpuBrowserCompositor()) {
+     content::GpuDataManager::GetInstance()->CanUseGpuBrowserCompositor() &&
+     gfx::win::GetUndocumentedDPIScale() == 1.0f &&
+     gfx::GetDPIScale() == 1.0 &&
+     gfx::GetModernUIScale() == 1.0f) {

[girard, 2013/11/20 18:36:06]

GetUndocumentedDPIScale will identify users that are running with desktop
scaling enabled, but not under --high-dpi-support=1
GetDPIScale will identify users that are running with --high-dpi-support=1 and
with desktop scaling enabled
GetModernUIScale will identify users that have metro scaling enabled

     if (browser_->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH) {
       // Metro mode, add the 'Relaunch Chrome in desktop mode'.
       AddSeparator(ui::NORMAL_SEPARATOR);