Fix alignment issue of ContiguousContainer

third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h

 // 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.
 
 #ifndef DisplayItemList_h
 #define DisplayItemList_h
 
 #include "platform/graphics/ContiguousContainer.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "platform/graphics/paint/Transform3DDisplayItem.h"
 #include "wtf/Alignment.h"
 #include "wtf/Assertions.h"
 
 class SkPictureGpuAnalyzer;
 
 namespace blink {
 
 struct PaintChunk;
 
-// kDisplayItemAlignment must be a multiple of alignof(derived display item) for
-// each derived display item; the ideal value is the least common multiple.
-// Currently the limiting factor is TransformationMatrix (in
-// BeginTransform3DDisplayItem), which requests 16-byte alignment.
-static const size_t kDisplayItemAlignment = WTF_ALIGN_OF(BeginTransform3DDisplayItem);
 static const size_t kMaximumDisplayItemSize = sizeof(BeginTransform3DDisplayItem);
 
 // A container for a list of display items.
-class PLATFORM_EXPORT DisplayItemList : public ContiguousContainer<DisplayItem, kDisplayItemAlignment> {
+class PLATFORM_EXPORT DisplayItemList : public ContiguousContainer<DisplayItem> {
 public:
     DisplayItemList(size_t initialSizeBytes)
         : ContiguousContainer(kMaximumDisplayItemSize, initialSizeBytes) {}
     DisplayItemList(DisplayItemList&& source)
         : ContiguousContainer(std::move(source))
         , m_visualRects(std::move(source.m_visualRects))
         , m_beginItemIndices(std::move(source.m_beginItemIndices))
     {}
 
     DisplayItemList& operator=(DisplayItemList&& source)
@@ skipping 34 matching lines @@
     // given visual rect with the begin display item's visual rect.
     void growCurrentBeginItemVisualRect(const IntRect& visualRect);
 
     Vector<IntRect> m_visualRects;
     Vector<size_t> m_beginItemIndices;
 };
 
 } // namespace blink
 
 #endif // DisplayItemList_h