Drive: Adds clearDriveCache API to file_browser_private.

chrome/browser/chromeos/extensions/file_browser_private_api.cc

Index: chrome/browser/chromeos/extensions/file_browser_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.cc b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
index c52d35102109abd52c973e15721189a0a5101252..edf20d8bb6d6f47fbd7b9ae8a2f59c1f7c8d0023 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
@@ -2381,6 +2381,20 @@ void SearchDriveFunction::OnSearch(
   SendResponse(true);
 }
 
+bool ClearDriveCacheFunction::RunImpl() {
+  gdata::GDataSystemService* system_service =
+      gdata::GDataSystemServiceFactory::GetForProfile(profile_);
+  // |system_service| is NULL if incognito window / guest login.
+  if (!system_service || !system_service->file_system())
+    return false;
+
+  // TODO(yoshiki): Receive a callback from JS-side and pass it to ClearCache().

[satorux1, 2012/08/03 17:54:21]

Please file a bug that describes the plan and add a URL here.

[yoshiki, 2012/08/03 20:09:48]

Done.

+  system_service->ClearCache(base::Callback<void(bool)>());
+
+  SendResponse(true);
+  return true;
+}
+
 bool GetNetworkConnectionStateFunction::RunImpl() {
   chromeos::NetworkLibrary* network_library =
       chromeos::CrosLibrary::Get()->GetNetworkLibrary();