Fix again HeapEntry size problem, now platform-independent way.

src/profile-generator.h

Index: src/profile-generator.h
diff --git a/src/profile-generator.h b/src/profile-generator.h
index 9f956e115a508c2b00075517dfad68a3c9261946..30d70a2c7495643e922edf251e3fe635bee4e9ef 100644
--- a/src/profile-generator.h
+++ b/src/profile-generator.h
@@ -615,14 +615,10 @@ class HeapEntry BASE_EMBEDDED {
   };
   HeapEntry* dominator_;
   HeapSnapshot* snapshot_;
-#ifdef WIN32
   struct Id {
     uint32_t id1_;
     uint32_t id2_;
-  } id_;  // This is to avoid extra padding of 64-bit value on MSVC.
-#else
-  uint64_t id_;
-#endif
+  } id_;  // This is to avoid extra padding of 64-bit value.
   const char* name_;
 
   // Paints used for exact retained sizes calculation.