DevTools: Added error message when the command is invoked from the console with exception

Source/core/inspector/InjectedScriptSource.js

Index: Source/core/inspector/InjectedScriptSource.js
diff --git a/Source/core/inspector/InjectedScriptSource.js b/Source/core/inspector/InjectedScriptSource.js
index 4660bb19cfaf3693edd895463ba1fbb2ef81a2d3..0a2da2966d249544c8560871bfbde8184de87d6b 100644
--- a/Source/core/inspector/InjectedScriptSource.js
+++ b/Source/core/inspector/InjectedScriptSource.js
@@ -617,7 +617,7 @@ InjectedScript.prototype = {
                      result: this._wrapObject(func.apply(object, resolvedArgs), objectGroup, returnByValue),
                      __proto__: null };
         } catch (e) {
-            return this._createThrownValue(e, objectGroup);
+            return this._createThrownValue(e, objectGroup, returnByValue, false);
         }
     },
 
@@ -670,21 +670,25 @@ InjectedScript.prototype = {
                      result: this._wrapObject(wrappedResult.result, objectGroup, returnByValue, generatePreview),
                      __proto__: null };
         }
-        return this._createThrownValue(wrappedResult.result, objectGroup, wrappedResult.exceptionDetails);
+        return this._createThrownValue(wrappedResult.result, objectGroup, returnByValue, generatePreview, wrappedResult.exceptionDetails);
     },
 
     /**
      * @param {*} value
      * @param {string} objectGroup
+     * @param {boolean} returnByValue
+     * @param {boolean} generatePreview
      * @param {!DebuggerAgent.ExceptionDetails=} exceptionDetails
      * @return {!Object}
      */
-    _createThrownValue: function(value, objectGroup, exceptionDetails)
+    _createThrownValue: function(value, objectGroup, returnByValue, generatePreview, exceptionDetails)

[vsevik, 2014/07/17 13:13:22]

I am not sure whether the changes we do here are safe for protocol.
Pavel, could you please have a look?

     {
-        var remoteObject = this._wrapObject(value, objectGroup);
-        try {
-            remoteObject.description = toStringDescription(value);
-        } catch (e) {}
+        var remoteObject = this._wrapObject(value, objectGroup, returnByValue, generatePreview && !(value instanceof Error));
+        if (!remoteObject.description || value instanceof Error) {
+            try {
+                remoteObject.description = toStringDescription(value);
+            } catch (e) {}
+        }
         return { wasThrown: true, result: remoteObject, exceptionDetails: exceptionDetails, __proto__: null };
     },