Revert "Remove NullPointerException."

runtime/vm/code_generator.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler_macros.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 1361 matching lines @@
 DEFINE_RUNTIME_ENTRY(ReportObjectNotClosure, 2) {
   ASSERT(arguments.ArgCount() ==
          kReportObjectNotClosureRuntimeEntry.argument_count());
   const Instance& instance = Instance::CheckedHandle(arguments.ArgAt(0));
   const Array& function_args = Array::CheckedHandle(arguments.ArgAt(1));
   const String& function_name = String::Handle(Symbols::Call());
   GrowableArray<const Object*> dart_arguments(5);
   if (instance.IsNull()) {
     dart_arguments.Add(&function_name);
     dart_arguments.Add(&function_args);
-    Exceptions::ThrowByType(Exceptions::kNullThrown, dart_arguments);
+    Exceptions::ThrowByType(Exceptions::kNullPointer, dart_arguments);
     UNREACHABLE();
   }
 
   // TODO(regis): Resolve and invoke "call" method, if existing.
 
   const Object& null_object = Object::Handle();
   dart_arguments.Add(&instance);
   dart_arguments.Add(&function_name);
   dart_arguments.Add(&function_args);
   dart_arguments.Add(&null_object);
@@ skipping 551 matching lines @@
     intptr_t line, column;
     script.GetTokenLocation(token_pos, &line, &column);
     String& line_string = String::Handle(script.GetLine(line));
     OS::Print("  Function: %s\n", top_function.ToFullyQualifiedCString());
     OS::Print("  Line %"Pd": '%s'\n", line, line_string.ToCString());
   }
 }
 
 
 }  // namespace dart