Revert 236254 "Replace old with new synthetic gesture framework."

trunk/src/content/browser/renderer_host/input/immediate_input_router.cc

 // 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.
 
 #include "content/browser/renderer_host/input/immediate_input_router.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "content/browser/renderer_host/input/gesture_event_filter.h"
@@ skipping 78 matching lines @@
       touch_event_queue_(new TouchEventQueue(this)),
       gesture_event_filter_(new GestureEventFilter(this, this)) {
   DCHECK(sender);
   DCHECK(client);
   DCHECK(ack_handler);
 }
 
 ImmediateInputRouter::~ImmediateInputRouter() {
 }
 
-void ImmediateInputRouter::Flush() {}
+void ImmediateInputRouter::Flush() {
+  NOTREACHED() << "ImmediateInputRouter will never request a flush.";
+}
 
 bool ImmediateInputRouter::SendInput(scoped_ptr<IPC::Message> message) {
   DCHECK(IPC_MESSAGE_ID_CLASS(message->type()) == InputMsgStart);
   switch (message->type()) {
     // Check for types that require an ACK.
     case InputMsg_SelectRange::ID:
       return SendSelectRange(message.Pass());
     case InputMsg_MoveCaret::ID:
       return SendMoveCaret(message.Pass());
     case InputMsg_HandleInputEvent::ID:
@@ skipping 575 matching lines @@
       break;
   }
 }
 
 bool ImmediateInputRouter::IsInOverscrollGesture() const {
   OverscrollController* controller = client_->GetOverscrollController();
   return controller && controller->overscroll_mode() != OVERSCROLL_NONE;
 }
 
 }  // namespace content