Clip texts on drive banner using ellipsis.

ui/file_manager/file_manager/foreground/css/drive_welcome.css

Index: ui/file_manager/file_manager/foreground/css/drive_welcome.css
diff --git a/ui/file_manager/file_manager/foreground/css/drive_welcome.css b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
index c8e2f044dfbab4b364de33d9b700162a80bc6a36..49776cdb9544e6fe2bea9dab08016797f39ca64b 100644
--- a/ui/file_manager/file_manager/foreground/css/drive_welcome.css
+++ b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
@@ -96,6 +96,7 @@
 .drive-welcome.header .drive-welcome-icon {
   background-position: center 18px;
   background-size: 51px 44px;
+  flex: none;

[fukino, 2014/07/10 01:06:45]

Without "flex: none", the drive welcome icon shrink. This should have been added
by the CL about migration to flex, but I missed it.

   width: 120px;
 }
 
@@ -109,10 +110,16 @@
   font-size: 140%;
   margin-bottom: 4px;
   margin-top: 14px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .drive-welcome.header .drive-welcome-text {
   margin-bottom: 6px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .drive-welcome.header .drive-welcome-dismiss {