Get Win32K lockdown for renderers working again on Windows 8+.

ui/gfx/win/dpi.cc

Index: ui/gfx/win/dpi.cc
diff --git a/ui/gfx/win/dpi.cc b/ui/gfx/win/dpi.cc
index e93a38d8bd00cee34c1fae4fc8007d56709d6d57..bb8ff63a85ba126e3a82c0a662f686cdb56fa7fe 100644
--- a/ui/gfx/win/dpi.cc
+++ b/ui/gfx/win/dpi.cc
@@ -134,14 +134,15 @@ Size GetDPI() {
 
 float GetDPIScale() {
   if (IsHighDPIEnabled()) {
-    if (GetDPI().width() <= 120) {
-      // 120 logical pixels is 125% scale. We do this to maintain previous
+    float dpi_scale = gfx::Display::HasForceDeviceScaleFactor() ?

[sky, 2014/09/24 23:51:15]

If there is a forced scale we should honor it.

[ananta, 2014/09/24 23:56:00]

Thanks for catching that. Fixed

+        gfx::Display::GetForcedDeviceScaleFactor() :
+        GetUnforcedDeviceScaleFactor();
+    if (dpi_scale <= 1.25) {
+      // Force 125% and below to 100% scale. We do this to maintain previous
       // (non-DPI-aware) behavior where only the font size was boosted.
       return 1.0;
     }
-    return gfx::Display::HasForceDeviceScaleFactor() ?
-        gfx::Display::GetForcedDeviceScaleFactor() :
-        GetUnforcedDeviceScaleFactor();
+    return dpi_scale;
   }
   return 1.0;
 }