[DevTools] Add sourceMap support for blackboxing

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js b/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
index 71b7fc56840279e4e786884b493486f547c40827..8c70c02443871ae4e6b1772a5ccbe94c4f2cb282 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
@@ -241,6 +241,14 @@ WebInspector.SourceMap.prototype = {
     },
 
     /**
+     * @return {!Array<!WebInspector.SourceMap.Entry>}
+     */
+    mappings: function()
+    {
+        return this._mappings;
+    },
+
+    /**
      * @param {string} sourceURL
      * @return {!Array.<!WebInspector.SourceMap.Entry>}
      */