gdata: Convert public synchronous functions in GDataFileSystem to asynchronous.

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index a34fa3ed40ae68f297bd5fb3d21ff1a5b1000179..902436b66dd163fbde7f45d75b89310ae6eef1a4 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -125,21 +125,6 @@ typedef base::Callback<void(const std::string& resource_id)>
 typedef base::Callback<void(base::PlatformFileError error,
                             int cache_state)> GetCacheStateCallback;
 
-// Helper structure used for extracting key properties from GDataFile object.
-// TODO(satorux): Remove this as part of crosbug.com/30066
-struct GDataFileProperties {
-  GDataFileProperties();
-  ~GDataFileProperties();
-
-  base::PlatformFileInfo file_info;
-  std::string resource_id;
-  std::string file_md5;
-  std::string mime_type;
-  GURL content_url;
-  GURL alternate_url;
-  bool is_hosted_document;
-};
-
 // GData file system abstraction layer.
 // The interface is defined to make GDataFileSystem mockable.
 class GDataFileSystemInterface {
@@ -414,13 +399,6 @@ class GDataFileSystemInterface {
   virtual void SearchAsync(const std::string& search_query,
                            const ReadDirectoryCallback& callback) = 0;
 
-
-  // Finds a file (not a directory) by |file_path| and returns its key
-  // |properties|.  Returns true if file was found.
-  // TODO(satorux): Remove this: crosbug.com/30066.
-  virtual bool GetFileInfoByPath(const FilePath& file_path,
-                                 GDataFileProperties* properties) = 0;
-
   // Returns true if the given path is under gdata cache directory, i.e.
   // <user_profile_dir>/GCache/v1
   virtual bool IsUnderGDataCacheDirectory(const FilePath& path) const = 0;
@@ -531,8 +509,6 @@ class GDataFileSystem : public GDataFileSystemInterface,
       const ReadDirectoryCallback& callback) OVERRIDE;
   virtual void RequestDirectoryRefresh(
       const FilePath& file_path) OVERRIDE;
-  virtual bool GetFileInfoByPath(const FilePath& file_path,
-                                 GDataFileProperties* properties) OVERRIDE;
   virtual bool IsUnderGDataCacheDirectory(const FilePath& path) const OVERRIDE;
   virtual FilePath GetCacheDirectoryPath(
       GDataCache::CacheSubDirectoryType sub_dir_type) const OVERRIDE;
@@ -719,16 +695,24 @@ class GDataFileSystem : public GDataFileSystemInterface,
                            const FilePath& remote_dest_file_path,
                            const FileOperationCallback& callback);
 
+  // Invoked upon completion of GetFileInfoByPathAsync initiated by
+  // GetFileByPath. It then continues to invoke GetFileByPathOnUIThread.
+  void OnGetFileInfoCompleteForGetFileByPath(
+      const FilePath& file_path,
+      const GetFileCallback& get_file_callback,
+      const GetDownloadDataCallback& get_download_data_callback,
+      base::PlatformFileError error,
+      scoped_ptr<GDataFileProto> file_info);
   // Invoked upon completion of GetFileInfoByPathAsync initiated by OpenFile.
-  // It then continues to invoke GetFileByPath and processed to
+  // It then continues to invoke GetFileByPathOnUIThread and proceeds to
   // OnGetFileCompleteForOpenFile.
   void OnGetFileInfoCompleteForOpenFile(const FilePath& file_path,
                                         const OpenFileCallback& callback,
                                         base::PlatformFileError error,
                                         scoped_ptr<GDataFileProto> file_info);
   // Invoked upon completion of GetFileInfoByPathAsync initiated by CloseFile.
-  // It then continues to invoke GetFileByPath and processed to
-  // OnGetFileCompleteForCloseFile.
+  // It then continues to invoke CommitDirtyInCache and proceeds to
+  // OnCommitDirtyInCacheCompleteForCloseFile.
   void OnGetFileInfoCompleteForCloseFile(const FilePath& file_path,
                                          const CloseFileCallback& callback,
                                          base::PlatformFileError error,
@@ -1470,7 +1454,9 @@ class GDataFileSystem : public GDataFileSystemInterface,
   void GetFileByPathOnUIThread(
       const FilePath& file_path,
       const GetFileCallback& get_file_callback,
-      const GetDownloadDataCallback& get_download_data_callback);
+      const GetDownloadDataCallback& get_download_data_callback,
+      base::PlatformFileError error,
+      const GDataFileProto* file_proto);
   void GetFileByResourceIdOnUIThread(
       const std::string& resource_id,
       const GetFileCallback& get_file_callback,