Preventing our default handlers for ChromeOS to show up or confuse the user

chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc

 // Copyright (c) 2012 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/browser/custom_handlers/protocol_handler_registry.h"
 
 #include <set>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 211 matching lines @@
   }
 
   void ReloadProtocolHandlerRegistry() {
     delegate_ = new FakeDelegate();
     registry_->Finalize();
     registry_ = NULL;
     registry_ = new ProtocolHandlerRegistry(profile(), delegate());
     registry_->Load();
   }
 
+  void ReloadProtocolHandlerRegistryAndInstallDefaultHandler() {
+    delegate_ = new FakeDelegate();
+    registry_->Finalize();
+    registry_ = NULL;
+    registry_ = new ProtocolHandlerRegistry(profile(), delegate());
+    registry_->AddDefaultHandler(CreateProtocolHandler(
+        "test", GURL("http://test.com/%s"), "Test"));
+    registry_->Load();
+  }
+
   virtual void SetUp() {
     ui_message_loop_.reset(new MessageLoopForUI());
     ui_thread_.reset(new content::TestBrowserThread(BrowserThread::UI,
                                                     MessageLoop::current()));
     io_thread_.reset(new content::TestBrowserThread(BrowserThread::IO));
     io_thread_->StartIOThread();
 
     file_thread_.reset(new content::TestBrowserThread(BrowserThread::FILE));
     file_thread_->Start();
 
@@ skipping 547 matching lines @@
       GURL("http://other.com/%s"), "test");
   ASSERT_EQ(ph1.url().GetOrigin() == ph2.url().GetOrigin(),
       ph1.IsSameOrigin(ph2));
   ASSERT_EQ(ph1.url().GetOrigin() == ph2.url().GetOrigin(),
       ph2.IsSameOrigin(ph1));
   ASSERT_EQ(ph2.url().GetOrigin() == ph3.url().GetOrigin(),
       ph2.IsSameOrigin(ph3));
   ASSERT_EQ(ph3.url().GetOrigin() == ph2.url().GetOrigin(),
       ph3.IsSameOrigin(ph2));
 }
+
+TEST_F(ProtocolHandlerRegistryTest, TestInstallDefaultHandler) {
+  ReloadProtocolHandlerRegistryAndInstallDefaultHandler();
+  std::vector<std::string> protocols;
+  registry()->GetRegisteredProtocols(&protocols);
+  ASSERT_EQ(static_cast<size_t>(1), protocols.size());
+}