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

chrome/browser/chromeos/drive/mock_drive_cache_observer.cc

Index: chrome/browser/chromeos/drive/mock_drive_cache_observer.cc
diff --git a/chrome/browser/chromeos/drive/mock_drive_cache_observer.cc b/chrome/browser/chromeos/drive/mock_drive_cache_observer.cc
index 5c31339d1c20681c3f19a571fab407934c095758..afab995c14c01c7b7e6494829f6fbed34f9afc4b 100644
--- a/chrome/browser/chromeos/drive/mock_drive_cache_observer.cc
+++ b/chrome/browser/chromeos/drive/mock_drive_cache_observer.cc
@@ -4,7 +4,7 @@
 
 #include "chrome/browser/chromeos/drive/mock_drive_cache_observer.h"
 
-namespace gdata {
+namespace drive {
 
 MockDriveCacheObserver::MockDriveCacheObserver() {
 }
@@ -12,4 +12,4 @@ MockDriveCacheObserver::MockDriveCacheObserver() {
 MockDriveCacheObserver::~MockDriveCacheObserver() {
 }
 
-}  // namespace gdata
+}  // namespace drive