Generate the storage of pseudoBits and styleType in ComputedStyleBase.

third_party/WebKit/Source/core/style/ComputedStyle.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index 5dd19f8a4ccbf6b31a18c234b14f22b4c6f70557..b9360ae366f388a9be6a6bdbc77e6fb533e8757b 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -72,7 +72,7 @@ ASSERT_SIZE(BorderValue, SameSizeAsBorderValue);
 // re-create the same structure for an accurate size comparison.
 struct SameSizeAsComputedStyle : public RefCounted<SameSizeAsComputedStyle> {
   struct ComputedStyleBase {
-    unsigned m_bitfields[3];
+    unsigned m_bitfields[4];
   } m_base;
 
   void* dataRefs[7];