gdata: Implement periodic file system update checks.

chrome/browser/chromeos/gdata/gdata_files.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/chromeos/gdata/gdata_files.h"
 
 #include <vector>
 
 #include "base/utf_string_conversions.h"
 #include "base/platform_file.h"
 #include "base/stringprintf.h"
 #include "base/string_util.h"
 #include "chrome/browser/chromeos/gdata/find_entry_delegate.h"
 #include "chrome/browser/chromeos/gdata/gdata.pb.h"
 #include "chrome/browser/chromeos/gdata/gdata_parser.h"
 #include "net/base/escape.h"
 
 namespace gdata {
 namespace {
 
-// Content refresh time.
-#ifndef NDEBUG
-const int kRefreshTimeInSec = 10;
-#else
-const int kRefreshTimeInSec = 5*60;
-#endif
-
 const char kSlash[] = "/";
 const char kEscapedSlash[] = "\xE2\x88\x95";
 const FilePath::CharType kGDataRootDirectory[] = FILE_PATH_LITERAL("gdata");
 
 std::string CacheSubDirectoryTypeToString(
     GDataRootDirectory::CacheSubDirectoryType subdir) {
   switch (subdir) {
     case GDataRootDirectory::CACHE_TYPE_META: return "meta";
     case GDataRootDirectory::CACHE_TYPE_PINNED: return "pinned";
     case GDataRootDirectory::CACHE_TYPE_OUTGOING: return "outgoing";
@@ skipping 225 matching lines @@
   if (parent_link)
     dir->parent_resource_id_ = ExtractResourceId(parent_link->href());
 
   const Link* upload_link = doc->GetLinkByType(Link::RESUMABLE_CREATE_MEDIA);
   if (upload_link)
     dir->upload_url_ = upload_link->href();
 
   return dir;
 }
 
-bool GDataDirectory::NeedsRefresh() const {
-  // Already refreshing by someone else.
-  if (origin_ == REFRESHING)
-    return false;
-
-  // Refresh is needed for content read from disk cache or stale content.
-  if (origin_ == FROM_CACHE)
-    return true;
-
-  if ((base::Time::Now() - refresh_time_).InSeconds() < kRefreshTimeInSec)
-    return false;
-
-  return true;
-}
-
 void GDataDirectory::AddEntry(GDataEntry* entry) {
   // The entry name may have been changed due to prior name de-duplication.
   // We need to first restore the file name based on the title before going
   // through name de-duplication again when it is added to another directory.
   entry->SetFileNameFromTitle();
 
   // Do file name de-duplication - find files with the same name and
   // append a name modifier to the name.
   int max_modifier = 1;
   FilePath full_file_name(entry->file_name());
@@ skipping 524 matching lines @@
   bool ok = proto->ParseFromString(serialized_proto);
   if (ok) {
     FromProto(*proto.get());
     set_origin(FROM_CACHE);
     set_refresh_time(base::Time::Now());
   }
   return ok;
 }
 
 }  // namespace gdata