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

components/search/search.cc

Index: components/search/search.cc
diff --git a/components/search/search.cc b/components/search/search.cc
index d7e7276fcfade5b90a83c035dd87eea2997a8dbc..c2d4b4e126e65f140f71997ddbc66967ab208d34 100644
--- a/components/search/search.cc
+++ b/components/search/search.cc
@@ -67,8 +67,8 @@ bool IsInstantExtendedAPIEnabled() {
 // default search provider. If 0, the embedded search UI should not be enabled.
 uint64 EmbeddedSearchPageVersion() {
 #if defined(OS_ANDROID)
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableEmbeddedSearchAPI)) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableEmbeddedSearchAPI)) {
     return kEmbeddedSearchEnabledVersion;
   }
 #endif