Consolidate all touch/gesture related constants in content

content/browser/renderer_host/input/input_router_impl.h

Index: content/browser/renderer_host/input/input_router_impl.h
diff --git a/content/browser/renderer_host/input/input_router_impl.h b/content/browser/renderer_host/input/input_router_impl.h
index a586d5d339e382396f40cd49b5b7e5d491d0e1dd..76af1c4e1a7ca496a73f38dbc9163d1134520993 100644
--- a/content/browser/renderer_host/input/input_router_impl.h
+++ b/content/browser/renderer_host/input/input_router_impl.h
@@ -40,10 +40,17 @@ class CONTENT_EXPORT InputRouterImpl
       public NON_EXPORTED_BASE(TouchEventQueueClient),
       public NON_EXPORTED_BASE(TouchpadTapSuppressionControllerClient) {
  public:
+  struct CONTENT_EXPORT Config {
+    Config();
+    GestureEventQueue::Config gesture_config;
+    TouchEventQueue::Config touch_config;
+  };
+
   InputRouterImpl(IPC::Sender* sender,
                   InputRouterClient* client,
                   InputAckHandler* ack_handler,
-                  int routing_id);
+                  int routing_id,
+                  const Config& config);
   virtual ~InputRouterImpl();
 
   // InputRouter
@@ -193,8 +200,9 @@ private:
 
   // Called when a touch timeout-affecting bit has changed, in turn toggling the
   // touch ack timeout feature of the |touch_event_queue_| as appropriate. Input
-  // to that determination includes current view properties, the allowed touch
-  // action and the command-line configured |touch_ack_timeout_supported_|.
+  // to that determination includes current view properties and the allowed
+  // touch action. Note that this will only affect platforms that have a
+  // non-zero touch timeout configuration.
   void UpdateTouchAckTimeoutEnabled();
 
   // If a flush has been requested, signals a completed flush to the client if
@@ -257,10 +265,6 @@ private:
   // The time when an input event was sent to the client.
   base::TimeTicks input_event_start_time_;
 
-  // Whether touch ack timeout handling has been enabled via the command line.
-  bool touch_ack_timeout_supported_;
-  base::TimeDelta touch_ack_timeout_delay_;
-
   // Cached flags from |OnViewUpdated()|, defaults to 0.
   int current_view_flags_;