Use Drive v2 API: enable behind --enable-drive-api flag

chrome/browser/chromeos/gdata/gdata_parser.cc

Index: chrome/browser/chromeos/gdata/gdata_parser.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_parser.cc b/chrome/browser/chromeos/gdata/gdata_parser.cc
index 7cd8edbded8541dcac47b2950db8b4837c872eb0..acfc46274189f578e07c005dfa3e000538972eed 100644
--- a/chrome/browser/chromeos/gdata/gdata_parser.cc
+++ b/chrome/browser/chromeos/gdata/gdata_parser.cc
@@ -134,6 +134,11 @@ const char kValueAttr[] = "value";
 const char kOpenWithPrefix[] = "http://schemas.google.com/docs/2007#open-with-";
 const size_t kOpenWithPrefixSize = arraysize(kOpenWithPrefix) - 1;
 
+// Drive API JSON names.
+const char kQuotaBytesTotal[] = "quotaBytesTotal";
+const char kQuotaBytesUsed[] = "quotaBytesUsed";
+const char kLargestChangeId[] = "largestChangeId";
+
 struct EntryKindMap {
   DocumentEntry::EntryKind kind;
   const char* entry;
@@ -1000,6 +1005,42 @@ void InstalledApp::RegisterJSONConverter(
 ////////////////////////////////////////////////////////////////////////////////
 // AccountMetadataFeed implementation
 
+class AccountMetadataFeedDocumentList : public AccountMetadataFeed {
+ public:
+  AccountMetadataFeedDocumentList() : AccountMetadataFeed() {}
+  virtual ~AccountMetadataFeedDocumentList() {}
+
+  // Registers the mapping between JSON field names and the members in this
+  // class.
+  static void RegisterJSONConverter(
+      base::JSONValueConverter<AccountMetadataFeedDocumentList>* converter);
+
+  // Parses and initializes data members from content of |value|.
+  // Return false if parsing fails.
+  virtual bool Parse(const base::Value& value) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AccountMetadataFeedDocumentList);
+};
+
+class AccountMetadataFeedDriveAPI : public AccountMetadataFeed {
+ public:
+  AccountMetadataFeedDriveAPI() : AccountMetadataFeed() {}
+  virtual ~AccountMetadataFeedDriveAPI() {}
+
+  // Registers the mapping between JSON field names and the members in this
+  // class.
+  static void RegisterJSONConverter(
+      base::JSONValueConverter<AccountMetadataFeedDriveAPI>* converter);
+
+  // Parses and initializes data members from content of |value|.
+  // Return false if parsing fails.
+  virtual bool Parse(const base::Value& value) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AccountMetadataFeedDriveAPI);
+};
+
 AccountMetadataFeed::AccountMetadataFeed()
     : quota_bytes_total_(0),
       quota_bytes_used_(0),
@@ -1010,42 +1051,80 @@ AccountMetadataFeed::~AccountMetadataFeed() {
 }
 
 // static
-void AccountMetadataFeed::RegisterJSONConverter(
-    base::JSONValueConverter<AccountMetadataFeed>* converter) {
+scoped_ptr<AccountMetadataFeed> AccountMetadataFeed::CreateFrom(
+    const base::Value& value, bool use_drive_api) {
+  if (use_drive_api) {
+    scoped_ptr<AccountMetadataFeedDriveAPI> feed(
+        new AccountMetadataFeedDriveAPI());
+    if (!feed->Parse(value)) {
+      LOG(ERROR) << "Unable to create: Invalid account metadata feed!";
+      return scoped_ptr<AccountMetadataFeed>(NULL);
+    }
+    return feed.PassAs<AccountMetadataFeed>();
+  }
+
+  scoped_ptr<AccountMetadataFeedDocumentList> feed(
+      new AccountMetadataFeedDocumentList());
+  const base::DictionaryValue* dictionary = NULL;
+  base::Value* entry = NULL;
+  if (!value.GetAsDictionary(&dictionary) ||
+      !dictionary->Get(kEntryField, &entry) ||
+      !feed->Parse(*entry)) {
+    LOG(ERROR) << "Unable to create: Invalid account metadata feed!";
+    return scoped_ptr<AccountMetadataFeed>(NULL);
+  }
+  return feed.PassAs<AccountMetadataFeed>();
+}
+
+// static
+void AccountMetadataFeedDocumentList::RegisterJSONConverter(
+    base::JSONValueConverter<AccountMetadataFeedDocumentList>* converter) {
   converter->RegisterCustomField<int64>(
       kQuotaBytesTotalField,
-      &AccountMetadataFeed::quota_bytes_total_,
+      &AccountMetadataFeedDocumentList::quota_bytes_total_,
       &base::StringToInt64);
   converter->RegisterCustomField<int64>(
       kQuotaBytesUsedField,
-      &AccountMetadataFeed::quota_bytes_used_,
+      &AccountMetadataFeedDocumentList::quota_bytes_used_,
       &base::StringToInt64);
   converter->RegisterCustomField<int>(
       kLargestChangestampField,
-      &AccountMetadataFeed::largest_changestamp_,
+      &AccountMetadataFeedDocumentList::largest_changestamp_,
       &base::StringToInt);
-  converter->RegisterRepeatedMessage(kInstalledAppField,
-                                     &AccountMetadataFeed::installed_apps_);
+  converter->RegisterRepeatedMessage<InstalledApp>(
+      kInstalledAppField,
+      &AccountMetadataFeedDocumentList::installed_apps_);
 }
 
-// static
-scoped_ptr<AccountMetadataFeed> AccountMetadataFeed::CreateFrom(
-    const base::Value& value) {
-  scoped_ptr<AccountMetadataFeed> feed(new AccountMetadataFeed());
-  const base::DictionaryValue* dictionary = NULL;
-  base::Value* entry = NULL;
-  if (!value.GetAsDictionary(&dictionary) ||
-      !dictionary->Get(kEntryField, &entry) ||
-      !feed->Parse(*entry)) {
-    LOG(ERROR) << "Unable to create: Invalid account metadata feed!";
-    return scoped_ptr<AccountMetadataFeed>(NULL);
+bool AccountMetadataFeedDocumentList::Parse(const base::Value& value) {
+  base::JSONValueConverter<AccountMetadataFeedDocumentList> converter;
+  if (!converter.Convert(value, this)) {
+    LOG(ERROR) << "Unable to parse: Invalid account metadata feed!";
+    return false;
   }
+  return true;
+}
 
-  return feed.Pass();
+// static
+void AccountMetadataFeedDriveAPI::RegisterJSONConverter(
+    base::JSONValueConverter<AccountMetadataFeedDriveAPI>* converter) {
+  converter->RegisterCustomField<int64>(
+      kQuotaBytesTotal,
+      &AccountMetadataFeedDriveAPI::quota_bytes_total_,
+      &base::StringToInt64);
+  converter->RegisterCustomField<int64>(
+      kQuotaBytesUsed,
+      &AccountMetadataFeedDriveAPI::quota_bytes_used_,
+      &base::StringToInt64);
+  converter->RegisterCustomField<int>(
+      kLargestChangeId,
+      &AccountMetadataFeedDriveAPI::largest_changestamp_,
+      &base::StringToInt);
+  // TODO(kochi): To get installed apps, Drive V2 API needs another API call.
 }
 
-bool AccountMetadataFeed::Parse(const base::Value& value) {
-  base::JSONValueConverter<AccountMetadataFeed> converter;
+bool AccountMetadataFeedDriveAPI::Parse(const base::Value& value) {
+  base::JSONValueConverter<AccountMetadataFeedDriveAPI> converter;
   if (!converter.Convert(value, this)) {
     LOG(ERROR) << "Unable to parse: Invalid account metadata feed!";
     return false;