Move the ShouldUseDirectWrite function from sandbox_win.cc/.h to ui/gfx/win/dpi.cc/.h.

content/common/sandbox_win.cc

Index: content/common/sandbox_win.cc
diff --git a/content/common/sandbox_win.cc b/content/common/sandbox_win.cc
index 97071757abc33e58740185a2cfc0e343bf68d87f..31632381dfc3f88c7da34a166778de811290ec02 100644
--- a/content/common/sandbox_win.cc
+++ b/content/common/sandbox_win.cc
@@ -12,7 +12,6 @@
 #include "base/debug/trace_event.h"
 #include "base/files/file_util.h"
 #include "base/hash.h"
-#include "base/metrics/field_trial.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/strings/string_util.h"
@@ -578,39 +577,6 @@ bool InitTargetServices(sandbox::TargetServices* target_services) {
   return sandbox::SBOX_ALL_OK == result;
 }
 
-bool ShouldUseDirectWrite() {
-  // If the flag is currently on, and we're on Win7 or above, we enable
-  // DirectWrite. Skia does not require the additions to DirectWrite in QFE
-  // 2670838, but a simple 'better than XP' check is not enough.
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return false;
-
-  base::win::OSInfo::VersionNumber os_version =
-      base::win::OSInfo::GetInstance()->version_number();
-  if ((os_version.major == 6) && (os_version.minor == 1)) {
-    // We can't use DirectWrite for pre-release versions of Windows 7.
-    if (os_version.build < 7600)
-      return false;
-  }
-
-  // If forced off, don't use it.
-  const base::CommandLine& command_line =
-      *base::CommandLine::ForCurrentProcess();
-  if (command_line.HasSwitch(switches::kDisableDirectWrite))
-    return false;
-
-#if !defined(NACL_WIN64)
-  // Can't use GDI on HiDPI.
-  if (gfx::GetDPIScale() > 1.0f)
-    return true;
-#endif
-
-  // Otherwise, check the field trial.
-  const std::string group_name =
-      base::FieldTrialList::FindFullName("DirectWrite");
-  return group_name != "Disabled";
-}
-
 base::ProcessHandle StartSandboxedProcess(
     SandboxedProcessLauncherDelegate* delegate,
     base::CommandLine* cmd_line) {
@@ -682,13 +648,15 @@ base::ProcessHandle StartSandboxedProcess(
     return 0;
 
   if (type_str == switches::kRendererProcess) {
-    if (ShouldUseDirectWrite()) {
+#if !defined(NACL_WIN64)
+    if (gfx::win::ShouldUseDirectWrite()) {
       AddDirectory(base::DIR_WINDOWS_FONTS,
                   NULL,
                   true,
                   sandbox::TargetPolicy::FILES_ALLOW_READONLY,
                   policy);
     }
+#endif
   } else {
     // Hack for Google Desktop crash. Trick GD into not injecting its DLL into
     // this subprocess. See