Move fling implementation from renderer to browser:

content/browser/renderer_host/input/immediate_input_router.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_IMMEDIATE_INPUT_ROUTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_IMMEDIATE_INPUT_ROUTER_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
-#include "content/browser/renderer_host/input/gesture_event_filter.h"
+#include "content/browser/renderer_host/input/fling/flinger.h"
+#include "content/browser/renderer_host/input/gesture_event_filter_client.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #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"
 
 namespace IPC {
 class Sender;
 }
 
 namespace ui {
 struct LatencyInfo;
 }
 
 namespace content {
-
+class BaseGestureEventFilter;
 class InputAckHandler;
 class InputRouterClient;
 class OverscrollController;
 class RenderWidgetHostImpl;
 
 // A default implementation for browser input event routing. Input commands are
 // forwarded to the renderer immediately upon receipt.
 class CONTENT_EXPORT ImmediateInputRouter
     : public NON_EXPORTED_BASE(InputRouter),
       public NON_EXPORTED_BASE(GestureEventFilterClient),
       public NON_EXPORTED_BASE(TouchEventQueueClient),
-      public NON_EXPORTED_BASE(TouchpadTapSuppressionControllerClient) {
+      public NON_EXPORTED_BASE(TouchpadTapSuppressionControllerClient),
+      public NON_EXPORTED_BASE(FlingHelper) {
  public:
   ImmediateInputRouter(IPC::Sender* sender,
                        InputRouterClient* client,
                        InputAckHandler* ack_handler,
                        int routing_id);
   virtual ~ImmediateInputRouter();
 
   // InputRouter
   virtual void Flush() OVERRIDE;
   virtual bool SendInput(scoped_ptr<IPC::Message> message) OVERRIDE;
@@ skipping 28 matching lines @@
       const TouchEventWithLatencyInfo& touch_event) OVERRIDE;
   virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
                                InputEventAckState ack_result) OVERRIDE;
 
   // GetureEventFilterClient
   virtual void SendGestureEventImmediately(
       const GestureEventWithLatencyInfo& gesture_event) OVERRIDE;
   virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
                                  InputEventAckState ack_result) OVERRIDE;
 
+  // FlingHelper
+  virtual void SendEventForFling(const blink::WebInputEvent& event) OVERRIDE;
+  virtual void FlingFinished(
+      blink::WebGestureEvent::SourceDevice source) OVERRIDE;
+
   bool SendMoveCaret(scoped_ptr<IPC::Message> message);
   bool SendSelectRange(scoped_ptr<IPC::Message> message);
   bool Send(IPC::Message* message);
 
   // Filters and forwards |input_event| to the appropriate handler.
   void FilterAndSendWebInputEvent(const blink::WebInputEvent& input_event,
                                   const ui::LatencyInfo& latency_info,
                                   bool is_keyboard_shortcut);
 
   // Utility routine for filtering and forwarding |input_event| to the
@@ skipping 70 matching lines @@
 
   void HandleGestureScroll(const GestureEventWithLatencyInfo& gesture_event);
 
   void SimulateTouchGestureWithMouse(
       const MouseEventWithLatencyInfo& mouse_event);
 
   bool IsInOverscrollGesture() const;
 
   int routing_id() const { return routing_id_; }
 
+  BaseGestureEventFilter* gesture_event_filter();
 
   IPC::Sender* sender_;
   InputRouterClient* client_;
   InputAckHandler* ack_handler_;
   int routing_id_;
 
   // (Similar to |mouse_move_pending_|.) True while waiting for SelectRange_ACK.
   bool select_range_pending_;
 
   // (Similar to |next_mouse_move_|.) The next SelectRange to send, if any.
@@ skipping 43 matching lines @@
   // Keeps track of whether the webpage has any touch event handler. If it does,
   // then touch events are sent to the renderer. Otherwise, the touch events are
   // not sent to the renderer.
   bool has_touch_handler_;
 
   // The source of the ack within the scope of |ProcessInputEventAck()|.
   // Defaults to ACK_SOURCE_NONE.
   AckSource current_ack_source_;
 
   scoped_ptr<TouchEventQueue> touch_event_queue_;
-  scoped_ptr<GestureEventFilter> gesture_event_filter_;
+  scoped_ptr<Flinger> flinger_;
+
+  class EventFilteringHelper;
+  scoped_ptr<EventFilteringHelper> event_filter_;
+
+  enum InputMessageSource {
+    MESSAGE_SOURCE_FLING,
+    MESSAGE_SOURCE_REGULAR,
+  };
+
+  std::queue<InputMessageSource> in_process_messages_sources_;
 
   DISALLOW_COPY_AND_ASSIGN(ImmediateInputRouter);
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_IMMEDIATE_INPUT_ROUTER_H_