Move all callers of GetHomeDir() to PathService::Get(base::DIR_HOME).

content/ppapi_plugin/ppapi_plugin_main.cc

Index: content/ppapi_plugin/ppapi_plugin_main.cc
diff --git a/content/ppapi_plugin/ppapi_plugin_main.cc b/content/ppapi_plugin/ppapi_plugin_main.cc
index ab32b665346b4b57ce4f4af44574e567cbbbc34c..3c1d7215fcde666fe89c36ade87c46162e153fc8 100644
--- a/content/ppapi_plugin/ppapi_plugin_main.cc
+++ b/content/ppapi_plugin/ppapi_plugin_main.cc
@@ -2,10 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
+#include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop/message_loop.h"
+#include "base/path_service.h"
 #include "base/threading/platform_thread.h"
 #include "build/build_config.h"
 #include "content/child/child_process.h"
@@ -101,7 +104,14 @@ int PpapiPluginMain(const MainFunctionParams& parameters) {
 #if defined(OS_CHROMEOS)
   // Specifies $HOME explicitly because some plugins rely on $HOME but
   // no other part of Chrome OS uses that.  See crbug.com/335290.
-  setenv("HOME", base::GetHomeDir().value().c_str(), 1);
+  base::FilePath homedir;
+  if (command_line.HasSwitch(switches::kHomedir)) {
+    homedir =
+        base::FilePath(command_line.GetSwitchValueASCII(switches::kHomedir));
+  } else {
+    PathService::Get(base::DIR_HOME, &homedir);
+  }
+  setenv("HOME", homedir.value().c_str(), 1);
 #endif
 
   base::MessageLoop main_message_loop;