Reduce SharedFunctionInfo size.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d8852427613ce939b7542b209bb5f39b0a522d63..80b8860e41fb9e1c4c5110a795d84eed403d254d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6911,11 +6911,12 @@ class SharedFunctionInfo: public HeapObject {
   static const int kConstructStubOffset = kScopeInfoOffset + kPointerSize;
   static const int kInstanceClassNameOffset =
       kConstructStubOffset + kPointerSize;
+  // Shared field: a function is either an API function or debuggable.
   static const int kFunctionDataOffset =
       kInstanceClassNameOffset + kPointerSize;
+  static const int kDebugInfoOffset = kFunctionDataOffset;
   static const int kScriptOffset = kFunctionDataOffset + kPointerSize;
-  static const int kDebugInfoOffset = kScriptOffset + kPointerSize;
-  static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize;
+  static const int kInferredNameOffset = kScriptOffset + kPointerSize;
   static const int kFeedbackVectorOffset =
       kInferredNameOffset + kPointerSize;
 #if TRACE_MAPS