Remove GraphicsLayer::didScroll and directly call ScrollableArea::didScroll

third_party/WebKit/Source/platform/scroll/ScrollbarTestSuite.h

 // Copyright 2016 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 ScrollbarTestSuite_h
 #define ScrollbarTestSuite_h
 
 #include "platform/heap/GarbageCollected.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
@@ skipping 45 matching lines @@
   }
   IntSize minimumScrollOffsetInt() const override { return IntSize(); }
   IntSize maximumScrollOffsetInt() const override {
     return expandedIntSize(m_maximumScrollOffset);
   }
   int visibleHeight() const override { return 768; }
   int visibleWidth() const override { return 1024; }
   bool scrollAnimatorEnabled() const override { return false; }
   int pageStep(ScrollbarOrientation) const override { return 0; }
   void scrollControlWasSetNeedsPaintInvalidation() {}
+  void setScrollOrigin(const IntPoint& origin) {
+    ScrollableArea::setScrollOrigin(origin);
+  }
 
   RefPtr<WebTaskRunner> getTimerTaskRunner() const final {
     return Platform::current()->currentThread()->scheduler()->timerTaskRunner();
   }
 
   using ScrollableArea::horizontalScrollbarNeedsPaintInvalidation;
   using ScrollableArea::verticalScrollbarNeedsPaintInvalidation;
   using ScrollableArea::clearNeedsPaintInvalidationForScrollControls;
 
   DEFINE_INLINE_VIRTUAL_TRACE() { ScrollableArea::trace(visitor); }
 
  protected:
   explicit MockScrollableArea() : m_maximumScrollOffset(ScrollOffset(0, 100)) {}
   explicit MockScrollableArea(const ScrollOffset& offset)
       : m_maximumScrollOffset(offset) {}
 
  private:
   void setMaximumScrollOffset(const ScrollOffset& maximumScrollOffset) {
     m_maximumScrollOffset = maximumScrollOffset;
   }
 
   ScrollOffset m_scrollOffset;
   ScrollOffset m_maximumScrollOffset;
 };
 
 }  // namespace blink
 
 #endif