Disentangle header dependecies a bit by moving PropertyDetails-related types into a separate header

src/v8globals.h

Index: src/v8globals.h
diff --git a/src/v8globals.h b/src/v8globals.h
index 3a29a64453aa70baf3df85f68babce4cdf51b8f3..03351771948b2f297f1a25bbbd7247ac0ac89fc4 100644
--- a/src/v8globals.h
+++ b/src/v8globals.h
@@ -324,49 +324,6 @@ typedef void (*StoreBufferCallback)(Heap* heap,
                                     StoreBufferEvent event);
 
 
-// Type of properties.
-// Order of properties is significant.
-// Must fit in the BitField PropertyDetails::TypeField.
-// A copy of this is in mirror-debugger.js.
-enum PropertyType {
-  NORMAL                    = 0,  // only in slow mode
-  FIELD                     = 1,  // only in fast mode
-  CONSTANT_FUNCTION         = 2,  // only in fast mode
-  CALLBACKS                 = 3,
-  HANDLER                   = 4,  // only in lookup results, not in descriptors
-  INTERCEPTOR               = 5,  // only in lookup results, not in descriptors
-  MAP_TRANSITION            = 6,  // only in fast mode
-  ELEMENTS_TRANSITION       = 7,
-  CONSTANT_TRANSITION       = 8,  // only in fast mode
-  NULL_DESCRIPTOR           = 9,  // only in fast mode
-  // All properties before MAP_TRANSITION are real.
-  FIRST_PHANTOM_PROPERTY_TYPE = MAP_TRANSITION,
-  // There are no IC stubs for NULL_DESCRIPTORS. Therefore,
-  // NULL_DESCRIPTOR can be used as the type flag for IC stubs for
-  // nonexistent properties.
-  NONEXISTENT = NULL_DESCRIPTOR
-};
-
-
-inline bool IsTransitionType(PropertyType type) {
-  switch (type) {
-    case MAP_TRANSITION:
-    case CONSTANT_TRANSITION:
-    case ELEMENTS_TRANSITION:
-      return true;
-    case NORMAL:
-    case FIELD:
-    case CONSTANT_FUNCTION:
-    case CALLBACKS:
-    case HANDLER:
-    case INTERCEPTOR:
-    case NULL_DESCRIPTOR:
-      return false;
-  }
-  UNREACHABLE();  // keep the compiler happy
-  return false;
-}
-
 // Whether to remove map transitions and constant transitions from a
 // DescriptorArray.
 enum TransitionFlag {