Made Print Preview tests autogenerated from print_preview.js.

chrome/browser/ui/webui/javascript2webui.js

Index: chrome/browser/ui/webui/javascript2webui.js
diff --git a/chrome/browser/ui/webui/javascript2webui.js b/chrome/browser/ui/webui/javascript2webui.js
index a61a4adc746ba0d3848434aa530f4e972db64175..3f748cf6bb349c5dfbf835323915be9b9d7d4f96 100644
--- a/chrome/browser/ui/webui/javascript2webui.js
+++ b/chrome/browser/ui/webui/javascript2webui.js
@@ -19,6 +19,9 @@ if (!('test_fixture' in this)) {
   print(js_file + ' did not define test_fixture.');
   quit(-1);
 }
+if (!('test_add_library' in this)) {
+  this['test_add_library'] = true;
+}
 print('// GENERATED FILE');
 print('// ' + arguments.join(' '));
 print('// PLEASE DO NOT HAND EDIT!');
@@ -26,7 +29,9 @@ print();
 for (var func in this) {
   if (!prevfuncs[func] && this[func] instanceof Function) {
     print('IN_PROC_BROWSER_TEST_F(' + test_fixture + ', ' + func + ') {');
-    print('  AddLibrary(FilePath(FILE_PATH_LITERAL("' + js_file_base + '")));');
+    if (test_add_library)
+      print('  AddLibrary(FilePath(FILE_PATH_LITERAL("' + js_file_base +
+            '")));');
     print('  ASSERT_TRUE(RunJavascriptTest("' + func + '"));');
     print('}');
     print();