PPAPI: Add PluginPrivateFileSystem

content/renderer/pepper/pepper_file_system_host.cc

Index: content/renderer/pepper/pepper_file_system_host.cc
diff --git a/content/renderer/pepper/pepper_file_system_host.cc b/content/renderer/pepper/pepper_file_system_host.cc
index 042c84f97bb6d5a770bd410758304f0b76fac339..ed70040eb3594ead0911d7e92c7a252927e35a59 100644
--- a/content/renderer/pepper/pepper_file_system_host.cc
+++ b/content/renderer/pepper/pepper_file_system_host.cc
@@ -15,6 +15,7 @@
 #include "ppapi/host/dispatch_host_message.h"
 #include "ppapi/host/ppapi_host.h"
 #include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/file_system_util.h"
 #include "ppapi/shared_impl/file_type_conversion.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
@@ -23,23 +24,6 @@
 
 namespace content {
 
-namespace {
-
-// TODO(nhiroki): Move this function somewhere else to be shared.
-std::string IsolatedFileSystemTypeToRootName(
-    PP_IsolatedFileSystemType_Private type) {
-  switch (type) {
-    case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_INVALID:
-      break;
-    case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_CRX:
-      return "crxfs";
-  }
-  NOTREACHED() << type;
-  return std::string();
-}
-
-}  // namespace
-
 PepperFileSystemHost::PepperFileSystemHost(RendererPpapiHost* host,
                                            PP_Instance instance,
                                            PP_Resource resource,
@@ -165,7 +149,7 @@ int32_t PepperFileSystemHost::OnHostMsgInitIsolatedFileSystem(
     return PP_ERROR_FAILED;
 
   const GURL& url = view->GetWebView()->mainFrame()->document().url();
-  const std::string root_name = IsolatedFileSystemTypeToRootName(type);
+  const std::string root_name = ppapi::IsolatedFileSystemTypeToRootName(type);
   if (root_name.empty())
     return PP_ERROR_BADARGUMENT;
   root_url_ = GURL(fileapi::GetIsolatedFileSystemRootURIString(