[inspector] Expose scopes for suspended generator objects

src/inspector/debugger_script_externs.js

Index: src/inspector/debugger_script_externs.js
diff --git a/src/inspector/debugger_script_externs.js b/src/inspector/debugger_script_externs.js
index f7325893bc6fb428078d35d1e34e167123d8ff20..6ac668ef9617fb0637ffda32ff014ef8145cadee 100644
--- a/src/inspector/debugger_script_externs.js
+++ b/src/inspector/debugger_script_externs.js
@@ -391,6 +391,15 @@ GeneratorMirror.prototype.sourceLocation = function() {}
 /** @return {!FunctionMirror} */
 GeneratorMirror.prototype.func = function() {}
 
+/** @return {number} */
+GeneratorMirror.prototype.scopeCount = function() {}
+
+/**
+ * @param {number} index
+ * @return {!ScopeMirror|undefined}
+ */
+GeneratorMirror.prototype.scope = function(index) {}
+
 
 /**
  * @interface