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

chrome/browser/extensions/test_extension_environment.cc

Index: chrome/browser/extensions/test_extension_environment.cc
diff --git a/chrome/browser/extensions/test_extension_environment.cc b/chrome/browser/extensions/test_extension_environment.cc
index e8d98506899184787c6955223970f0059c5f3220..8b5c30e406eaf85ed55813d0f190a608e98fda54 100644
--- a/chrome/browser/extensions/test_extension_environment.cc
+++ b/chrome/browser/extensions/test_extension_environment.cc
@@ -53,7 +53,7 @@ TestExtensionSystem* TestExtensionEnvironment::GetExtensionSystem() {
 ExtensionService* TestExtensionEnvironment::GetExtensionService() {
   if (extension_service_ == NULL) {
     extension_service_ = GetExtensionSystem()->CreateExtensionService(
-        CommandLine::ForCurrentProcess(), base::FilePath(), false);
+        base::CommandLine::ForCurrentProcess(), base::FilePath(), false);
   }
   return extension_service_;
 }
@@ -61,7 +61,7 @@ ExtensionService* TestExtensionEnvironment::GetExtensionService() {
 ExtensionPrefs* TestExtensionEnvironment::GetExtensionPrefs() {
   if (extension_prefs_ == NULL) {
     extension_prefs_ = GetExtensionSystem()->CreateExtensionPrefs(
-        CommandLine::ForCurrentProcess(), base::FilePath());
+        base::CommandLine::ForCurrentProcess(), base::FilePath());
   }
   return extension_prefs_;
 }