Fix alignment issue of ContiguousContainer

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

Index: third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.h
index f8b0e541278ad65c1ebafbd91d1efcac10a052e4..5c1b2d0045b6c5ba7de82fda9a32aa3b4baebb93 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.h
@@ -11,10 +11,10 @@
 
 namespace blink {
 
-class PLATFORM_EXPORT BeginScrollDisplayItem final : public PairedBeginDisplayItem {
+class PLATFORM_EXPORT BeginScrollDisplayItem final : public PairedBeginDisplayItem<BeginScrollDisplayItem> {
 public:
     BeginScrollDisplayItem(const DisplayItemClient& client, Type type, const IntSize& currentOffset)
-        : PairedBeginDisplayItem(client, type, sizeof(*this))
+        : PairedBeginDisplayItem(client, type)
         , m_currentOffset(currentOffset)
     {
         ASSERT(isScrollType(type));
@@ -40,10 +40,10 @@ private:
     const IntSize m_currentOffset;
 };
 
-class PLATFORM_EXPORT EndScrollDisplayItem final : public PairedEndDisplayItem {
+class PLATFORM_EXPORT EndScrollDisplayItem final : public PairedEndDisplayItem<EndScrollDisplayItem> {
 public:
     EndScrollDisplayItem(const DisplayItemClient& client, Type type)
-        : PairedEndDisplayItem(client, type, sizeof(*this))
+        : PairedEndDisplayItem(client, type)
     {
         ASSERT(isEndScrollType(type));
     }