Force inlining of some hot functions (problem reported by Bert Belder).

src/objects.h

Index: src/objects.h
===================================================================
--- src/objects.h	(revision 11776)
+++ src/objects.h	(working copy)
@@ -2574,11 +2574,11 @@
   void Sort(const WhitenessWitness&);
 
   // Search the instance descriptors for given name.
-  inline int Search(String* name);
+  INLINE(int Search(String* name));
 
   // As the above, but uses DescriptorLookupCache and updates it when
   // necessary.
-  inline int SearchWithCache(String* name);
+  INLINE(int SearchWithCache(String* name));
 
   // Tells whether the name is present int the array.
   bool Contains(String* name) { return kNotFound != Search(name); }