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

include/v8.h

 // Copyright 2012 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 1460 matching lines @@
    */
   int GetStartPosition() const;
 
   /**
    * Returns the index within the script of the last character where
    * the error occurred.
    */
   int GetEndPosition() const;
 
   /**
+   * Returns the error level of the message.
+   */
+  int ErrorLevel() const;
+
+  /**
    * Returns the index within the line of the first character where
    * the error occurred.
    */
   V8_DEPRECATE_SOON("Use maybe version", int GetStartColumn() const);
   V8_WARN_UNUSED_RESULT Maybe<int> GetStartColumn(Local<Context> context) const;
 
   /**
    * Returns the index within the line of the last character where
    * the error occurred.
    */
@@ skipping 4953 matching lines @@
     kDecimalWithLeadingZeroInStrictMode = 32,
     kLegacyDateParser = 33,
     kDefineGetterOrSetterWouldThrow = 34,
     kFunctionConstructorReturnedUndefined = 35,
 
     // If you add new values here, you'll also need to update Chromium's:
     // UseCounter.h, V8PerIsolateData.cpp, histograms.xml
     kUseCounterFeatureCount  // This enum value must be last.
   };
 
+  enum MessageErrorLevel {
+    kMessageLog = (1 << 0),
+    kMessageDebug = (1 << 1),
+    kMessageInfo = (1 << 2),
+    kMessageError = (1 << 3),
+    kMessageWarning = (1 << 4),
+    kMessageAll = kMessageLog | kMessageDebug | kMessageInfo | kMessageError |
+                  kMessageWarning,
+  };
+
   typedef void (*UseCounterCallback)(Isolate* isolate,
                                      UseCounterFeature feature);
 
 
   /**
    * Creates a new isolate.  Does not change the currently entered
    * isolate.
    *
    * When an isolate is no longer used its resources should be freed
    * by calling Dispose().  Using the delete operator is not allowed.
@@ skipping 584 matching lines @@
   void SetAllowCodeGenerationFromStringsCallback(
       AllowCodeGenerationFromStringsCallback callback);
 
   /**
   * Check if V8 is dead and therefore unusable.  This is the case after
   * fatal errors such as out-of-memory situations.
   */
   bool IsDead();
 
   /**
-   * Adds a message listener.
+   * Adds a message listener (errors only).
    *
    * The same message listener can be added more than once and in that
    * case it will be called more than once for each message.
    *
    * If data is specified, it will be passed to the callback when it is called.
    * Otherwise, the exception object will be passed to the callback instead.
    */
   bool AddMessageListener(MessageCallback that,
                           Local<Value> data = Local<Value>());
 
   /**
+   * Adds a message listener.
+   *
+   * The same message listener can be added more than once and in that
+   * case it will be called more than once for each message.
+   *
+   * If data is specified, it will be passed to the callback when it is called.
+   * Otherwise, the exception object will be passed to the callback instead.
+   *
+   * A listener can listen for particular error levels by providing a mask.
+   */
+  bool AddMessageListenerWithErrorLevel(MessageCallback that,
+                                        int message_levels,
+                                        Local<Value> data = Local<Value>());
+
+  /**
    * Remove all message listeners from the specified callback function.
    */
   void RemoveMessageListeners(MessageCallback that);
 
   /** Callback function for reporting failed access checks.*/
   void SetFailedAccessCheckCallbackFunction(FailedAccessCheckCallback);
 
   /**
    * Tells V8 to capture current stack trace when uncaught exception occurs
    * and report it to the message listeners. The option is off by default.
@@ skipping 2591 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_