Overscroll and Elasticity for views::ScrollView

ui/events/blink/input_scroll_elasticity_controller_unittest.cc

 // Copyright 2014 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 "ui/events/blink/input_scroll_elasticity_controller.h"
 
 #include "cc/input/input_handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 
@@ skipping 35 matching lines @@
   }
   gfx::ScrollOffset ScrollOffset() const override { return scroll_offset_; }
   gfx::ScrollOffset MaxScrollOffset() const override {
     return max_scroll_offset_;
   }
   void ScrollBy(const gfx::Vector2dF& delta) override {
     scroll_offset_ += gfx::ScrollOffset(delta);
   }
   void RequestOneBeginFrame() override { request_begin_frame_count_ += 1; }
 
+  base::WeakPtr<ScrollElasticityHelper> GetWeakPtr() override {
+    return nullptr;
+  }
+
   // Counters for number of times functions were called.
   int request_begin_frame_count() const { return request_begin_frame_count_; }
   int set_stretch_amount_count() const { return set_stretch_amount_count_; }
 
   void SetScrollOffsetAndMaxScrollOffset(
       const gfx::ScrollOffset& scroll_offset,
       const gfx::ScrollOffset& max_scroll_offset) {
     scroll_offset_ = scroll_offset;
     max_scroll_offset_ = max_scroll_offset;
   }
   void SetUserScrollable(bool is_user_scrollable) {
     is_user_scrollable_ = is_user_scrollable;
   }
 
  private:
   bool is_user_scrollable_;
   gfx::Vector2dF stretch_amount_;
   int set_stretch_amount_count_;
   int request_begin_frame_count_;
 
   gfx::ScrollOffset scroll_offset_;
   gfx::ScrollOffset max_scroll_offset_;
 };
 
 class ScrollElasticityControllerTest : public testing::Test {
  public:
   ScrollElasticityControllerTest()
-      : controller_(&helper_),
-        input_event_count_(0),
+      : input_event_count_(0),
         current_time_(base::TimeTicks::FromInternalValue(100000000ull)) {}
   ~ScrollElasticityControllerTest() override {}
 
 
   void SendGestureScrollBegin(InertialPhaseState inertialPhase) {
     blink::WebGestureEvent event;
     event.sourceDevice = blink::WebGestureDeviceTouchpad;
     event.type = blink::WebInputEvent::GestureScrollBegin;
     event.data.scrollBegin.inertialPhase =
         static_cast<blink::WebGestureEvent::InertialPhaseState>(inertialPhase);
@@ skipping 320 matching lines @@
     TickCurrentTimeAndAnimate();
     if (helper_.StretchAmount().IsZero())
       break;
     ticks_to_zero += 1;
   }
   EXPECT_GT(ticks_to_zero, 3);
 }
 
 }  // namespace
 }  // namespace ui