Move CommandLine to base namespace.

chrome/browser/chrome_browser_field_trials_mobile.h

Index: chrome/browser/chrome_browser_field_trials_mobile.h
diff --git a/chrome/browser/chrome_browser_field_trials_mobile.h b/chrome/browser/chrome_browser_field_trials_mobile.h
index dac960361d464efee57b1c7fdfa27942cfa4332a..dc5f278cbb331e523c21db053683166cc0cb6549 100644
--- a/chrome/browser/chrome_browser_field_trials_mobile.h
+++ b/chrome/browser/chrome_browser_field_trials_mobile.h
@@ -8,16 +8,19 @@
 #include "base/basictypes.h"
 #include "base/time/time.h"
 
-class CommandLine;
 class PrefService;
 
+namespace base {
+class CommandLine;
+}
+
 namespace chrome {
 
 // Sets up mobile-only field trials.
 // Add an invocation of your field trial init function to this method, or to
 // SetupFieldTrials in chrome_browser_field_trials.cc if it is for all
 // platforms.
-void SetupMobileFieldTrials(const CommandLine& parsed_command_line,
+void SetupMobileFieldTrials(const base::CommandLine& parsed_command_line,
                             const base::Time& install_time,
                             PrefService* local_state);