drive: Rename 'gdata' namespace to 'drive' in chrome/browser/chromeos/drive

chrome/browser/chromeos/drive/drive_cache.cc

Index: chrome/browser/chromeos/drive/drive_cache.cc
diff --git a/chrome/browser/chromeos/drive/drive_cache.cc b/chrome/browser/chromeos/drive/drive_cache.cc
index 74fc214312aff5e41a54aad0fdd127b9d8e790da..2c85631c4b9d675ea8ed2d0978f8ad516d368d17 100644
--- a/chrome/browser/chromeos/drive/drive_cache.cc
+++ b/chrome/browser/chromeos/drive/drive_cache.cc
@@ -23,7 +23,7 @@
 
 using content::BrowserThread;
 
-namespace gdata {
+namespace drive {
 namespace {
 
 const FilePath::CharType kDriveCacheVersionDir[] = FILE_PATH_LITERAL("v1");
@@ -1627,4 +1627,4 @@ void SetFreeDiskSpaceGetterForTesting(FreeDiskSpaceGetterInterface* getter) {
   global_free_disk_getter_for_testing = getter;
 }
 
-}  // namespace gdata
+}  // namespace drive