input: Remove dead code.

content/browser/renderer_host/input/synthetic_gesture_controller_unittest.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/synthetic_gesture_controller.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 654 matching lines @@
 };
 
 class DummySyntheticGestureControllerDelegate
     : public SyntheticGestureController::Delegate {
  public:
   DummySyntheticGestureControllerDelegate() {}
   ~DummySyntheticGestureControllerDelegate() override {}
 
  private:
   // SyntheticGestureController::Delegate:
-  void RequestBeginFrameForSynthesizedInput(
-      base::OnceClosure callback) override {}
   bool HasGestureStopped() override { return true; }
 
   DISALLOW_COPY_AND_ASSIGN(DummySyntheticGestureControllerDelegate);
 };
 
 }  // namespace
 
 class SyntheticGestureControllerTestBase {
  public:
   SyntheticGestureControllerTestBase() {}
@@ skipping 1079 matching lines @@
   FlushInputUntilComplete();
 
   EXPECT_EQ(4, num_success_);
   EXPECT_EQ(0, num_failure_);
   EXPECT_EQ(pointer_mouse_target->num_actions_dispatched(), 4);
   EXPECT_TRUE(
       pointer_mouse_target->SyntheticMouseActionDispatchedCorrectly(param, 1));
 }
 
 }  // namespace content