Print Preview: Use the global PrintPreviewTabController in unit tests.

chrome/test/base/testing_browser_process.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/base/testing_browser_process.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/printing/background_printing_manager.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "content/browser/debugger/devtools_manager.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TestingBrowserProcess::TestingBrowserProcess()
     : module_ref_count_(0),
       app_locale_("en"),
       local_state_(NULL),
@@ skipping 166 matching lines @@
 bool TestingBrowserProcess::IsShuttingDown() {
   return false;
 }
 
 printing::PrintJobManager* TestingBrowserProcess::print_job_manager() {
   return NULL;
 }
 
 printing::PrintPreviewTabController*
 TestingBrowserProcess::print_preview_tab_controller() {
-  return NULL;
+  if (!print_preview_tab_controller_.get())
+    print_preview_tab_controller_ = new printing::PrintPreviewTabController();
+  return print_preview_tab_controller_.get();
 }
 
 printing::BackgroundPrintingManager*
 TestingBrowserProcess::background_printing_manager() {
   if (!background_printing_manager_.get()) {
     background_printing_manager_.reset(
         new printing::BackgroundPrintingManager());
   }
   return background_printing_manager_.get();
 }
@@ skipping 61 matching lines @@
 }
 
 void TestingBrowserProcess::SetDevToolsManager(DevToolsManager* manager) {
   devtools_manager_.reset(manager);
 }
 
 void TestingBrowserProcess::SetBrowserPolicyConnector(
     policy::BrowserPolicyConnector* connector) {
   browser_policy_connector_.reset(connector);
 }