Initial browser-side implementation for touch-action

content/browser/renderer_host/input/immediate_input_router.h

Index: content/browser/renderer_host/input/immediate_input_router.h
diff --git a/content/browser/renderer_host/input/immediate_input_router.h b/content/browser/renderer_host/input/immediate_input_router.h
index cc760bddb1d196d2aed17ef2fa4597ff9ed05981..22f2b934420e4c83de343ec46329dae865f93895 100644
--- a/content/browser/renderer_host/input/immediate_input_router.h
+++ b/content/browser/renderer_host/input/immediate_input_router.h
@@ -15,6 +15,7 @@
 #include "content/browser/renderer_host/input/touch_event_queue.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
 #include "content/public/browser/native_web_keyboard_event.h"
+#include "content/public/common/touch_action.h"
 
 namespace IPC {
 class Sender;
@@ -123,6 +124,7 @@ private:
   void OnMsgMoveCaretAck();
   void OnSelectRangeAck();
   void OnHasTouchEventHandlers(bool has_handlers);
+  void OnSetTouchAction(int touch_id, content::TouchAction touchAction);
 
   // Indicates the source of an ack provided to |ProcessInputEventAck()|.
   // The source is tracked by |current_ack_source_|, which aids in ack routing.
@@ -167,7 +169,7 @@ private:
   void ProcessAckForOverscroll(const WebKit::WebInputEvent& event,
                                InputEventAckState ack_result);
 
-  void HandleGestureScroll(const GestureEventWithLatencyInfo& gesture_event);
+  bool FilterTouchAction(const GestureEventWithLatencyInfo& gesture_event);
 
   void SimulateTouchGestureWithMouse(
       const MouseEventWithLatencyInfo& mouse_event);
@@ -234,6 +236,12 @@ private:
   // not sent to the renderer.
   bool has_touch_handler_;
 
+  // Whether GestureScroll events should be discarded due to touch-action.
+  bool drop_scroll_gesture_events_;
+
+  // What touch actions are currently permitted.
+  content::TouchAction allowed_touch_action_;
+
   // The source of the ack within the scope of |ProcessInputEventAck()|.
   // Defaults to ACK_SOURCE_NONE.
   AckSource current_ack_source_;