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

chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc

Index: chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc
diff --git a/chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc b/chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc
index 83f171e3d487bce9eb6817b150c08be10d066f8f..60676b013640718d58ac3a2c6f311672035b430a 100644
--- a/chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc
+++ b/chrome/browser/chromeos/drive/mock_free_disk_space_getter.cc
@@ -4,7 +4,7 @@
 
 #include "chrome/browser/chromeos/drive/mock_free_disk_space_getter.h"
 
-namespace gdata {
+namespace drive {
 
 MockFreeDiskSpaceGetter::MockFreeDiskSpaceGetter() {
 }
@@ -12,4 +12,4 @@ MockFreeDiskSpaceGetter::MockFreeDiskSpaceGetter() {
 MockFreeDiskSpaceGetter::~MockFreeDiskSpaceGetter() {
 }
 
-}  // namespace gdata
+}  // namespace drive