Add type check tracing (--trace_type_checks). Inline type checks with class types that have only ...

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 1334)
+++ runtime/vm/object.h	(working copy)
@@ -738,6 +738,9 @@
   // Check if this type represents the 'Function' interface.
   bool IsFunctionInterface() const;
 
+  // Check if this type represents the 'List' interface.
+  bool IsListInterface() const;
+
   // Check if this type is an interface type.
   bool IsInterfaceType() const {
     if (!HasResolvedTypeClass()) {
@@ -790,6 +793,9 @@
   // The 'Function' interface type.
   static RawType* FunctionInterface();
 
+  // The 'List' interface type.
+  static RawType* ListInterface();
+
   // The least specific valid raw type of the given class.
   // For example, type A<Dynamic> would be returned for class A<T>, and type
   // B<Dynamic, A<Dynamic>> would be returned for B<U, V extends A>.