Add support for javascript incompatibility warnings.

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3995 matching lines @@
 };
 
 
 class LanguageError : public Error {
  public:
   enum Kind {
     kWarning,
     kError,
     kMalformedType,
     kMalboundedType,
+    kBailout,
   };
 
   Kind kind() const { return static_cast<Kind>(raw_ptr()->kind_); }
 
   // Build, cache, and return formatted message.
   RawString* FormatMessage() const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawLanguageError));
   }
 
   // A null script means no source and a negative token_pos means no position.
   static RawLanguageError* NewFormatted(const Error& prev_error,
                                         const Script& script,
                                         intptr_t token_pos,
                                         Kind kind,
                                         Heap::Space space,
                                         const char* format, ...)
     PRINTF_ATTRIBUTE(6, 7);
 
   static RawLanguageError* NewFormattedV(const Error& prev_error,
                                          const Script& script,
                                          intptr_t token_pos,
                                          Kind kind,
                                          Heap::Space space,
                                          const char* format, va_list args);
 
   static RawLanguageError* New(const String& formatted_message,
+                               Kind kind = kError,
                                Heap::Space space = Heap::kNew);
 
   virtual const char* ToErrorCString() const;
 
  private:
   RawError* previous_error() const {
     return raw_ptr()->previous_error_;
   }
   void set_previous_error(const Error& value) const;
 
@@ skipping 2980 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_