Added primary input devices setting to blink to allow media queries for hover/pointer

Source/WebCore/page/Settings.h

Index: Source/WebCore/page/Settings.h
diff --git a/Source/WebCore/page/Settings.h b/Source/WebCore/page/Settings.h
index 160d4c1c1fdf0554cca314faf85f718313a4da21..9a658514825f70957e542df08dd50fb471c65d04 100644
--- a/Source/WebCore/page/Settings.h
+++ b/Source/WebCore/page/Settings.h
@@ -57,6 +57,21 @@ namespace WebCore {
         TextDirectionSubmenuAlwaysIncluded
     };
 
+    // Enum  bit flags for primary pointer device to tell Blink what kind of
+    // input the user is primarily using. Note that it's not an exhaustive
+    // list of what is available on the user's system - rather, it's available
+    // pointer devices that we expect the user to use.
+    // e.g. Primary pointer may be set to PointerDeviceMouse even though the
+    // device has a mouse and a touch screen.
+    // Note: PointerDeviceNone is mutually exclusive with other flags
+    //       PointerDeviceUnknown is not actually a flag
+    enum PointerDevice {
+        PointerDeviceUnknown = 0,
+        PointerDeviceMouse = 1,
+        PointerDeviceTouch = 2,
+        PointerDeviceNone = 4
+    };
+
     // UScriptCode uses -1 and 0 for UScriptInvalidCode and UScriptCommon.
     // We need to use -2 and -3 for empty value and deleted value.
     struct UScriptCodeHashTraits : WTF::GenericHashTraits<int> {