[COPY] - Implemented API for tracking ongoing file transfers from file manager.

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
===================================================================
--- chrome/browser/chromeos/gdata/gdata_file_system.h	(revision 127341)
+++ chrome/browser/chromeos/gdata/gdata_file_system.h	(working copy)
@@ -19,6 +19,7 @@
 #include "base/platform_file.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/chromeos/gdata/gdata_files.h"
+#include "chrome/browser/chromeos/gdata/gdata_operation_registry.h"
 #include "chrome/browser/chromeos/gdata/gdata_params.h"
 #include "chrome/browser/chromeos/gdata/gdata_parser.h"
 #include "chrome/browser/chromeos/gdata/gdata_uploader.h"
@@ -233,6 +234,22 @@
   void GetFromCacheForPath(const FilePath& gdata_file_path,
                            const GetFromCacheCallback& callback);
 
+  // Gets the cache state of file corresponding to |resource_id| and |md5| if it
+  // exists on disk.
+  // Initializes cache if it has not been initialized.
+  // Upon completion, |callback| is invoked on the thread where this method was
+  // called with the cache state if file exists in cache or CACHE_STATE_NONE
+  // otherwise.
+  void GetCacheState(const std::string& resource_id,
+                     const std::string& md5,
+                     const GetCacheStateCallback& callback);
+  // Obtains the list of currently active operations.
+  std::vector<GDataOperationRegistry::ProgressStatus> GetProgressStatusList();
+  // Add operation observer.
+  void AddOperationObserver(GDataOperationRegistry::Observer* observer);
+  // Remove operation observer.
+  void RemoveOperationObserver(GDataOperationRegistry::Observer* observer);
+
   // Finds file object by |file_path| and returns its |file_info|.
   // Returns true if file was found.
   bool GetFileInfoFromPath(const FilePath& gdata_file_path,