Drive: add a method to clear all local cache.

chrome/browser/chromeos/gdata/gdata_system_service.h

Index: chrome/browser/chromeos/gdata/gdata_system_service.h
diff --git a/chrome/browser/chromeos/gdata/gdata_system_service.h b/chrome/browser/chromeos/gdata/gdata_system_service.h
index 070fa7718f69a685734624768f5d04ef599ca758..91c5c2f4d8d496f11da2065ee093b78d1de359f5 100644
--- a/chrome/browser/chromeos/gdata/gdata_system_service.h
+++ b/chrome/browser/chromeos/gdata/gdata_system_service.h
@@ -9,7 +9,9 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
+#include "base/memory/weak_ptr.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
@@ -41,6 +43,10 @@ class GDataSystemService : public ProfileKeyedService  {
   GDataContactsService* contacts_service() { return contacts_service_.get(); }
   DriveWebAppsRegistry* webapps_registry() { return webapps_registry_.get(); }
 
+  // Clears all the local cache files and resets cache-related information in
+  // the memory.
+  void ClearCacheAndResetOnUIThread();

[satorux1, 2012/08/01 21:56:31]

Please rename it to ClearCache(). This should suffice.

[yoshiki, 2012/08/01 23:07:59]

Done.

+
   // ProfileKeyedService override:
   virtual void Shutdown() OVERRIDE;
 
@@ -58,6 +64,9 @@ class GDataSystemService : public ProfileKeyedService  {
   // Unregisters drive mount point from File API.
   void RemoveDriveMountPoint();
 
+  // Used to implement ClearCacheAndResetOnUIThread().

[satorux1, 2012/08/01 21:56:31]

Please write some more, like:

// Adds back the drive mount point.
// Used to implement ClearCacheAndResetOnUIThread().

[yoshiki, 2012/08/01 23:07:59]

Done.

+  void AddBackDrivemountPoint(GDataFileError error, const FilePath& file_path);

[satorux1, 2012/08/01 21:56:31]

Drivemount -> DriveMount

[yoshiki, 2012/08/01 23:07:59]

Done.

+
   friend class GDataSystemServiceFactory;
 
   Profile* profile_;
@@ -70,6 +79,7 @@ class GDataSystemService : public ProfileKeyedService  {
   scoped_ptr<GDataDownloadObserver> download_observer_;
   scoped_ptr<GDataSyncClient> sync_client_;
   scoped_ptr<GDataContactsService> contacts_service_;
+  base::WeakPtrFactory<GDataSystemService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataSystemService);
 };