Fixed a crash while opening the file open/save dialogs on Windows 7 ASH.

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
index 87a0b739ea4e59ce00bdd854f957f62166d4e10c..f530490d1c77f5a7f9cc94ec73579cc4b2c3a123 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
@@ -31,6 +31,10 @@
 #include "ui/shell_dialogs/shell_dialogs_delegate.h"
 #endif
 
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
 #if !defined(OS_CHROMEOS)
 class ScreenTypeDelegateWin : public gfx::ScreenTypeDelegate {
  public:
@@ -49,6 +53,10 @@ class ShellDialogsDelegateWin : public ui::ShellDialogsDelegate {
  public:
   ShellDialogsDelegateWin() {}
   virtual bool IsWindowInMetro(gfx::NativeWindow window) OVERRIDE {
+#if defined(OS_WIN)
+    if (base::win::GetVersion() < base::win::VERSION_WIN8)
+      return false;
+#endif
     return chrome::IsNativeViewInAsh(window);
   }
  private: