[wasm] [asmjs] Route asm.js warnings to the dev console.

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 8869 matching lines @@
 
   int GetLineNumber() const;
 
   // Returns the offset of the given position within the containing line.
   int GetColumnNumber() const;
 
   // Returns the source code line containing the given source
   // position, or the empty string if the position is invalid.
   Handle<String> GetSourceLine() const;
 
+  inline int error_level() const;
+  inline void set_error_level(int level);
+
   DECLARE_CAST(JSMessageObject)
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSMessageObject)
   DECLARE_VERIFIER(JSMessageObject)
 
   // Layout description.
   static const int kTypeOffset = JSObject::kHeaderSize;
   static const int kArgumentsOffset = kTypeOffset + kPointerSize;
   static const int kScriptOffset = kArgumentsOffset + kPointerSize;
   static const int kStackFramesOffset = kScriptOffset + kPointerSize;
   static const int kStartPositionOffset = kStackFramesOffset + kPointerSize;
   static const int kEndPositionOffset = kStartPositionOffset + kPointerSize;
-  static const int kSize = kEndPositionOffset + kPointerSize;
+  static const int kErrorLevelOffset = kEndPositionOffset + kPointerSize;
+  static const int kSize = kErrorLevelOffset + kPointerSize;
 
   typedef FixedBodyDescriptor<HeapObject::kMapOffset,
                               kStackFramesOffset + kPointerSize,
                               kSize> BodyDescriptor;
 };
 
 class JSPromise : public JSObject {
  public:
   DECL_INT_ACCESSORS(status)
   DECL_ACCESSORS(result, Object)
@@ skipping 3095 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_