add 'manipulation' support to CSS touch-action parsing.

Source/core/rendering/style/RenderStyleConstants.h

Index: Source/core/rendering/style/RenderStyleConstants.h
diff --git a/Source/core/rendering/style/RenderStyleConstants.h b/Source/core/rendering/style/RenderStyleConstants.h
index 020ed1cb4e4edcdead438a74836128777f71c099..7da8d170bfc3c5c4ba351bc482c78c326326a1db 100644
--- a/Source/core/rendering/style/RenderStyleConstants.h
+++ b/Source/core/rendering/style/RenderStyleConstants.h
@@ -511,12 +511,13 @@ enum GridAutoFlow { AutoFlowNone, AutoFlowColumn, AutoFlowRow };
 
 enum DraggableRegionMode { DraggableRegionNone, DraggableRegionDrag, DraggableRegionNoDrag };
 
-static const size_t TouchActionBits = 3;
+static const size_t TouchActionBits = 4;
 enum TouchAction {
     TouchActionAuto = 0x0,
     TouchActionNone = 0x1,
     TouchActionPanX = 0x2,
-    TouchActionPanY = 0x4
+    TouchActionPanY = 0x4,
+    TouchActionPinchZoom = 0x8,
 };
 inline TouchAction operator| (TouchAction a, TouchAction b) { return TouchAction(int(a) | int(b)); }
 inline TouchAction& operator|= (TouchAction& a, TouchAction b) { return a = a | b; }