Make an empty content browser test work.

content/shell/shell_main_delegate.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/shell/shell_main_delegate.h"
+
+#include "base/command_line.h"
+#include "content/common/content_switches.h"
+#include "content/shell/shell_content_browser_client.h"
+#include "content/shell/shell_content_plugin_client.h"
+#include "content/shell/shell_content_renderer_client.h"
+#include "content/shell/shell_content_utility_client.h"
+
+ShellMainDelegate::ShellMainDelegate() {
+}
+
+ShellMainDelegate::~ShellMainDelegate() {
+}
+
+void ShellMainDelegate::PreSandboxStartup() {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  std::string process_type =
+      command_line.GetSwitchValueASCII(switches::kProcessType);
+
+  content::SetContentClient(&content_client_);
+  InitializeShellContentClient(process_type);
+}
+
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+void ShellMainDelegate::ZygoteForked() {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  std::string process_type =
+      command_line.GetSwitchValueASCII(switches::kProcessType);
+  InitializeShellContentClient(process_type);
+}
+#endif
+
+void ShellMainDelegate::InitializeShellContentClient(
+    const std::string& process_type) {
+  if (process_type.empty()) {
+    browser_client_.reset(new content::ShellContentBrowserClient);
+    content::GetContentClient()->set_browser(browser_client_.get());
+  } else if (process_type == switches::kRendererProcess) {
+    renderer_client_.reset(new content::ShellContentRendererClient);
+    content::GetContentClient()->set_renderer(renderer_client_.get());
+  } else if (process_type == switches::kPluginProcess) {
+    plugin_client_.reset(new content::ShellContentPluginClient);
+    content::GetContentClient()->set_plugin(plugin_client_.get());
+  } else if (process_type == switches::kUtilityProcess) {
+    utility_client_.reset(new content::ShellContentUtilityClient);
+    content::GetContentClient()->set_utility(utility_client_.get());
+  }
+}