Fix alignment issue of ContiguousContainer

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

Index: third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
index de020e23af719b5f39c96d279d09bffbea2e02f8..6b14363ad68fbd3fe268f57f11c84138f42b048b 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
@@ -14,10 +14,10 @@
 
 namespace blink {
 
-class PLATFORM_EXPORT ClipDisplayItem final : public PairedBeginDisplayItem {
+class PLATFORM_EXPORT ClipDisplayItem final : public PairedBeginDisplayItem<ClipDisplayItem> {
 public:
     ClipDisplayItem(const DisplayItemClient& client, Type type, const IntRect& clipRect)
-        : PairedBeginDisplayItem(client, type, sizeof(*this))
+        : PairedBeginDisplayItem(client, type)
         , m_clipRect(clipRect)
     {
         ASSERT(isClipType(type));
@@ -49,10 +49,10 @@ private:
     Vector<FloatRoundedRect> m_roundedRectClips;
 };
 
-class PLATFORM_EXPORT EndClipDisplayItem final : public PairedEndDisplayItem {
+class PLATFORM_EXPORT EndClipDisplayItem final : public PairedEndDisplayItem<EndClipDisplayItem> {
 public:
     EndClipDisplayItem(const DisplayItemClient& client, Type type)
-        : PairedEndDisplayItem(client, type, sizeof(*this))
+        : PairedEndDisplayItem(client, type)
     {
         ASSERT(isEndClipType(type));
     }