Experimental CompressibleString UMA

third_party/WebKit/Source/wtf/WTFThreadData.h

Index: third_party/WebKit/Source/wtf/WTFThreadData.h
diff --git a/third_party/WebKit/Source/wtf/WTFThreadData.h b/third_party/WebKit/Source/wtf/WTFThreadData.h
index 0dbd7e7c6baad8383340a53c35bf04bf1b21fec1..c2c26e9e95ac469c263b2c0692f4d0e900da8069 100644
--- a/third_party/WebKit/Source/wtf/WTFThreadData.h
+++ b/third_party/WebKit/Source/wtf/WTFThreadData.h
@@ -35,6 +35,14 @@
 #include "wtf/WTFExport.h"
 #include "wtf/text/StringHash.h"
 
+namespace blink {
+
+class CompressibleStringTable;
+
+typedef void (*CompressibleStringTableDestructor)(CompressibleStringTable*);
+
+}
+
 namespace WTF {
 
 class AtomicStringTable;
@@ -53,16 +61,24 @@ public:
         return m_atomicStringTable;
     }
 
+    blink::CompressibleStringTable* compressibleStringTable()
+    {
+        return m_compressibleStringTable;
+    }
+
     ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
 
 private:
     AtomicStringTable* m_atomicStringTable;
     AtomicStringTableDestructor m_atomicStringTableDestructor;
+    blink::CompressibleStringTable* m_compressibleStringTable;
+    blink::CompressibleStringTableDestructor m_compressibleStringTableDestructor;
     OwnPtr<ICUConverterWrapper> m_cachedConverterICU;
 
     static ThreadSpecific<WTFThreadData>* staticData;
     friend WTFThreadData& wtfThreadData();
     friend class AtomicStringTable;
+    friend class blink::CompressibleStringTable;
 };
 
 inline WTFThreadData& wtfThreadData()