[DevTools] Add error check before _reportDeprecatedCommentIfNeeded call

third_party/WebKit/Source/devtools/front_end/sdk/Script.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/Script.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/Script.js b/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
index 5a6fc2453bfd43fdf230f85dea2b5d9a2e1e2477..b4a3e1f46bd7b3a908c395fab8da756695d5cb1f 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
@@ -180,8 +180,12 @@ WebInspector.Script.prototype = {
          */
         function didGetScriptSource(error, source)
         {
-            WebInspector.Script._reportDeprecatedCommentIfNeeded(this, source);
-            this._source = WebInspector.Script._trimSourceURLComment(error ? "" : source);
+            if (!error) {
+                WebInspector.Script._reportDeprecatedCommentIfNeeded(this, source);
+                this._source = WebInspector.Script._trimSourceURLComment(source);
+            } else {
+                this._source = "";
+            }
             callback(this._source);
         }
     },