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

third_party/WebKit/Source/platform/scroll/ScrollableAreaTest.cpp

 // Copyright 2015 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 "platform/scroll/ScrollableArea.h"
 
 #include "platform/graphics/Color.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/scroll/ScrollbarTestSuite.h"
 #include "platform/scroll/ScrollbarTheme.h"
@@ skipping 235 matching lines @@
   EXPECT_EQ(ScrollbarOverlayColorThemeDark,
             scrollableArea->getScrollbarOverlayColorTheme());
   scrollableArea->recalculateScrollbarOverlayColorTheme(Color(34, 85, 51));
   EXPECT_EQ(ScrollbarOverlayColorThemeLight,
             scrollableArea->getScrollbarOverlayColorTheme());
   scrollableArea->recalculateScrollbarOverlayColorTheme(Color(236, 143, 185));
   EXPECT_EQ(ScrollbarOverlayColorThemeDark,
             scrollableArea->getScrollbarOverlayColorTheme());
 }
 
+TEST_F(ScrollableAreaTest, ScrollableAreaDidScroll) {
+  ScopedTestingPlatformSupport<TestingPlatformSupportWithMockScheduler>
+      platform;
+
+  MockScrollableArea* scrollableArea =
+      MockScrollableArea::create(ScrollOffset(100, 100));
+  scrollableArea->setScrollOrigin(IntPoint(20, 30));
+  scrollableArea->didScroll(gfx::ScrollOffset(40, 51));
+
+  // After calling didScroll, the new offset should account for scroll origin.
+  EXPECT_EQ(20, scrollableArea->scrollOffsetInt().width());
+  EXPECT_EQ(21, scrollableArea->scrollOffsetInt().height());
+}
+
 }  // namespace blink