Move CommandLine to base namespace.

chrome/installer/util/installer_state.h

Index: chrome/installer/util/installer_state.h
diff --git a/chrome/installer/util/installer_state.h b/chrome/installer/util/installer_state.h
index fd65574c347ceac546a3b628465677fb02b6ab33..7b22cf6ec35a5c8b884355acceca6ae55b8e46e8 100644
--- a/chrome/installer/util/installer_state.h
+++ b/chrome/installer/util/installer_state.h
@@ -23,7 +23,9 @@
 #include <windows.h>  // NOLINT
 #endif
 
+namespace base {
 class CommandLine;
+}
 
 namespace installer {
 
@@ -73,7 +75,7 @@ class InstallerState {
   explicit InstallerState(Level level);
 
   // Initializes this object based on the current operation.
-  void Initialize(const CommandLine& command_line,
+  void Initialize(const base::CommandLine& command_line,
                   const MasterPreferences& prefs,
                   const InstallationState& machine_state);