Fix alignment issue of ContiguousContainer

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

Index: third_party/WebKit/Source/platform/graphics/paint/CompositingDisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/CompositingDisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/CompositingDisplayItem.h
index 10dd663f844df7d18476d717cdc4c7cf5c82ad7c..adbd3bd7d4ad6a66629c954f802e2b7f5b377d0d 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/CompositingDisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/CompositingDisplayItem.h
@@ -15,10 +15,10 @@
 
 namespace blink {
 
-class PLATFORM_EXPORT BeginCompositingDisplayItem final : public PairedBeginDisplayItem {
+class PLATFORM_EXPORT BeginCompositingDisplayItem final : public PairedBeginDisplayItem<BeginCompositingDisplayItem> {
 public:
     BeginCompositingDisplayItem(const DisplayItemClient& client, const SkXfermode::Mode xferMode, const float opacity, const FloatRect* bounds, ColorFilter colorFilter = ColorFilterNone)
-        : PairedBeginDisplayItem(client, BeginCompositing, sizeof(*this))
+        : PairedBeginDisplayItem(client, BeginCompositing)
         , m_xferMode(xferMode)
         , m_opacity(opacity)
         , m_hasBounds(bounds)
@@ -54,10 +54,10 @@ private:
     ColorFilter m_colorFilter;
 };
 
-class PLATFORM_EXPORT EndCompositingDisplayItem final : public PairedEndDisplayItem {
+class PLATFORM_EXPORT EndCompositingDisplayItem final : public PairedEndDisplayItem<EndCompositingDisplayItem> {
 public:
     EndCompositingDisplayItem(const DisplayItemClient& client)
-        : PairedEndDisplayItem(client, EndCompositing, sizeof(*this)) { }
+        : PairedEndDisplayItem(client, EndCompositing) { }
 
     void replay(GraphicsContext&) const override;
     void appendToWebDisplayItemList(const IntRect&, WebDisplayItemList*) const override;