Make callers of CommandLine use it via the base:: namespace.

chrome/browser/extensions/api/history/history_api.cc

Index: chrome/browser/extensions/api/history/history_api.cc
diff --git a/chrome/browser/extensions/api/history/history_api.cc b/chrome/browser/extensions/api/history/history_api.cc
index 196ecaaf4cc5e6a73c38a7a5f77446573959fc41..7e2ca2329d56bbc933d072f2d551f9cd5dbb84b2 100644
--- a/chrome/browser/extensions/api/history/history_api.cc
+++ b/chrome/browser/extensions/api/history/history_api.cc
@@ -398,7 +398,7 @@ bool HistoryDeleteUrlFunction::RunAsync() {
   // Also clean out from the activity log. If the activity log testing flag is
   // set then don't clean so testers can see what potentially malicious
   // extensions have been trying to clean from their logs.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableExtensionActivityLogTesting)) {
     ActivityLog* activity_log = ActivityLog::GetInstance(GetProfile());
     DCHECK(activity_log);
@@ -431,7 +431,7 @@ bool HistoryDeleteRangeFunction::RunAsyncImpl() {
       &task_tracker_);
 
   // Also clean from the activity log unless in testing mode.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableExtensionActivityLogTesting)) {
     ActivityLog* activity_log = ActivityLog::GetInstance(GetProfile());
     DCHECK(activity_log);
@@ -461,7 +461,7 @@ bool HistoryDeleteAllFunction::RunAsyncImpl() {
       &task_tracker_);
 
   // Also clean from the activity log unless in testing mode.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableExtensionActivityLogTesting)) {
     ActivityLog* activity_log = ActivityLog::GetInstance(GetProfile());
     DCHECK(activity_log);