Update json_schema_compiler to handle the Automation extension API

tools/json_schema_compiler/js_externs_generator_test.py

Index: tools/json_schema_compiler/js_externs_generator_test.py
diff --git a/tools/json_schema_compiler/js_externs_generator_test.py b/tools/json_schema_compiler/js_externs_generator_test.py
index 917ce6379fb6db95b2973748096b55367282f66f..a070e2493a57b7007ae639340bb230ae6e751329 100755
--- a/tools/json_schema_compiler/js_externs_generator_test.py
+++ b/tools/json_schema_compiler/js_externs_generator_test.py
@@ -47,6 +47,12 @@ namespace fakeApi {
     ArrayBuffer arrayBuff;
   };
 
+  dictionary Qux {
+    long num;
+    static void go();
+    static void stop();
+  };
+
   callback VoidCallback = void();
 
   callback BazGreekCallback = void(Baz baz, Greek greek);
@@ -132,6 +138,29 @@ chrome.fakeApi.Bar;
 chrome.fakeApi.Baz;
 
 /**
+ * @constructor
+ * @see https://developer.chrome.com/extensions/fakeApi#type-Qux
+ */
+chrome.fakeApi.Qux = function() {};
+
+/**
+ * @type {number}
+ * @see https://developer.chrome.com/extensions/fakeApi#type-num
+ */
+chrome.fakeApi.Qux.prototype.num;
+
+/**
+ * @see https://developer.chrome.com/extensions/fakeApi#method-go
+ */
+chrome.fakeApi.Qux.prototype.go = function() {};
+
+/**
+ * @see https://developer.chrome.com/extensions/fakeApi#method-stop
+ */
+chrome.fakeApi.Qux.prototype.stop = function() {};
+
+
+/**
  * Does something exciting! And what's more, this is a multiline function
  * comment! It goes onto multiple lines!
  * @param {!chrome.fakeApi.Baz} baz The baz to use.