Report Javascript Runtime Errors to the Error Console

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index d46f3152968ece8a631fbf7250443e37f7857a12..d80a4c66c578de92a761f6aad52ea419b4d50328 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -5,6 +5,7 @@
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
+#include "base/logging.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
@@ -265,6 +266,18 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // Invoked when a user cancels a before unload dialog.
   virtual void BeforeUnloadDialogCancelled() {}
 
+  // Invoked when a message is added to the console. This includes errors, logs,
+  // warnings, and exceptions. |source| is the WebKit-reported source of the
+  // error (which can be either external or internal), |message| is the error
+  // message, and |stack_trace| is an optional stack trace of the error in a
+  // human-readable format (each frame is formatted as
+  // "\n    at function_name (source:line_number:column_number)").
+  virtual void OnMessageAddedToConsole(const base::string16& source,
+                                       const base::string16& message,
+                                       const base::string16& stack_trace,
+                                       int32 line_number,
+                                       logging::LogSeverity level) {}
+
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;