replace COMPILE_ASSERT with static assert in wtf/

Source/wtf/StringHasher.h

Index: Source/wtf/StringHasher.h
diff --git a/Source/wtf/StringHasher.h b/Source/wtf/StringHasher.h
index a0ad0d50743b543fb35e7e8d7cf6be4f17e4726f..ecfbfd9431d644cf1814efce12acd4fbc18b1c70 100644
--- a/Source/wtf/StringHasher.h
+++ b/Source/wtf/StringHasher.h
@@ -191,7 +191,7 @@ public:
 
     template<size_t length> static unsigned hashMemory(const void* data)
     {
-        COMPILE_ASSERT(!(length % 2), length_must_be_a_multiple_of_two);
+        static_assert(!(length % 2), "length must be a multiple of two");
         return hashMemory(data, length);
     }