gdata: Convert GDataFileSystem::AddUploadFile() 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 65a05d32e40dea50ac763986530b344132cf68ba..76374e267f7d53cf03e8ab11c27d44a3b55b5158 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -372,11 +372,13 @@ class GDataFileSystemInterface {
 
   // Creates a new file from |entry| under |virtual_dir_path|. Stored its
   // content from |file_content_path| into the cache.
-  virtual void AddUploadedFile(
-      const FilePath& virtual_dir_path,
-      DocumentEntry* entry,
-      const FilePath& file_content_path,
-      GDataCache::FileOperationType cache_operation) = 0;
+  //
+  // |callback| will be called on the UI thread upon completion of operation.
+  virtual void AddUploadedFile(const FilePath& virtual_dir_path,
+                               DocumentEntry* entry,
+                               const FilePath& file_content_path,
+                               GDataCache::FileOperationType cache_operation,
+                               const base::Closure& callback) = 0;
 
   // Returns true if hosted documents should be hidden.
   virtual bool hide_hosted_documents() = 0;
@@ -458,11 +460,11 @@ class GDataFileSystem : public GDataFileSystemInterface,
   // Calls private Pin or Unpin methods with |callback|.
   virtual void SetPinState(const FilePath& file_path, bool pin,
                            const FileOperationCallback& callback) OVERRIDE;
-  virtual void AddUploadedFile(
-      const FilePath& virtual_dir_path,
-      DocumentEntry* entry,
-      const FilePath& file_content_path,
-      GDataCache::FileOperationType cache_operation) OVERRIDE;
+  virtual void AddUploadedFile(const FilePath& virtual_dir_path,
+                               DocumentEntry* entry,
+                               const FilePath& file_content_path,
+                               GDataCache::FileOperationType cache_operation,
+                               const base::Closure& callback) OVERRIDE;
   virtual bool hide_hosted_documents() OVERRIDE;
 
   // content::NotificationObserver implementation.
@@ -997,6 +999,13 @@ class GDataFileSystem : public GDataFileSystemInterface,
       base::PlatformFileError error,
       UploadFileInfo* upload_file_info);
 
+  // Helper function called upon completion of AddUploadFile invoked by
+  // OnTransferCompleted.
+  void OnAddUploadFileCompleted(
+      const FileOperationCallback& callback,
+      base::PlatformFileError error,
+      UploadFileInfo* upload_file_info);
+
   // Kicks off file upload once it receives |upload_file_info|.
   void StartFileUploadOnUIThread(
       const FileOperationCallback& callback,
@@ -1414,6 +1423,11 @@ class GDataFileSystem : public GDataFileSystemInterface,
   void GetAvailableSpaceOnUIThread(const GetAvailableSpaceCallback& callback);
   void SetPinStateOnUIThread(const FilePath& file_path, bool to_pin,
                              const FileOperationCallback& callback);
+  void AddUploadedFileOnUIThread(const FilePath& virtual_dir_path,
+                                 DocumentEntry* entry,
+                                 const FilePath& file_content_path,
+                                 GDataCache::FileOperationType cache_operation,
+                                 const base::Closure& callback);
 
   scoped_ptr<GDataRootDirectory> root_;