Add a MANUAL_ prefix for browser tests. These tests don't run unless --run-manual is specified.

content/test/content_browser_test.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 "content/test/content_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_browser_context.h"
 #include "content/shell/shell_content_browser_client.h"
 #include "content/shell/shell_content_renderer_client.h"
 #include "content/shell/shell_main_delegate.h"
 #include "content/shell/shell_switches.h"
 #include "content/test/test_content_client.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 namespace content {
 
+IN_PROC_BROWSER_TEST_F(ContentBrowserTest, MANUAL_ShouldntRun) {
+  // Ensures that tests with MANUAL_ prefix don't run automatically.
+  ASSERT_TRUE(false);
+}
+
 ContentBrowserTest::ContentBrowserTest() {
 #if defined(OS_MACOSX)
   // See comment in InProcessBrowserTest::InProcessBrowserTest().
   FilePath content_shell_path;
   CHECK(PathService::Get(base::FILE_EXE, &content_shell_path));
   content_shell_path = content_shell_path.DirName();
   content_shell_path = content_shell_path.Append(
       FILE_PATH_LITERAL("Content Shell.app/Contents/MacOS/Content Shell"));
   CHECK(PathService::Override(base::FILE_EXE, content_shell_path));
 #endif
@@ skipping 95 matching lines @@
       static_cast<ShellContentBrowserClient*>(GetContentClient()->browser());
   return Shell::CreateNewWindow(
       browser_client->off_the_record_browser_context(),
       GURL(chrome::kAboutBlankURL),
       NULL,
       MSG_ROUTING_NONE,
       NULL);
 }
 
 }  // namespace content