Don't use DirectWrite if smoothing or ClearType is off

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 68a00dd55908e07826be58616e45858e8d996cdd..7047421936a877e0b0c9abbdadc2fa52db6f34fb 100644
--- a/content/common/sandbox_win.cc
+++ b/content/common/sandbox_win.cc
@@ -590,6 +590,16 @@ bool ShouldUseDirectWrite() {
     return true;
 #endif
 
+  // If anti-aliasing or ClearType are off, don't use DirectWrite.
+  BOOL smoothing = FALSE;
+  SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &smoothing, 0);
+  if (!smoothing)
+    return false;
+  UINT smooth_type = 0;
+  SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE, 0, &smooth_type, 0);
+  if (smooth_type != FE_FONTSMOOTHINGCLEARTYPE)
+    return false;
+
   // Otherwise, check the field trial.
   const std::string group_name =
       base::FieldTrialList::FindFullName("DirectWrite");