Add --enable-drive-api for Chrome OS

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 49ef645197fac32c71d764c576b4a37ea299e331..bd008047d8402fc5af087e2420fe392eb8f94dbe 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1332,6 +1332,9 @@ const char kSkipOAuthLogin[]                = "skip-oauth-login";
 // Enables device policy support on ChromeOS.
 const char kEnableDevicePolicy[]            = "enable-device-policy";
 
+// Enables Drive v2 API instead of Google Documents List API.
+const char kEnableDriveV2Api[]              = "enable-drive-v2-api";
+
 // Enables the redirection of viewable document requests to the Google Document
 // Viewer.
 const char kEnableGView[]                   = "enable-gview";