Move ExtensionSystem into extensions namespace

chrome/browser/extensions/extension_system_factory.cc

Index: chrome/browser/extensions/extension_system_factory.cc
diff --git a/chrome/browser/extensions/extension_system_factory.cc b/chrome/browser/extensions/extension_system_factory.cc
index c1700780b5adb5dd1e9ddde60c496c7cd33565f7..a9c98fae85a7487a8b3cba7ec61ca53376ab42bf 100644
--- a/chrome/browser/extensions/extension_system_factory.cc
+++ b/chrome/browser/extensions/extension_system_factory.cc
@@ -17,9 +17,9 @@
 // ExtensionSystemSharedFactory
 
 // static
-ExtensionSystemImpl::Shared* ExtensionSystemSharedFactory::GetForProfile(
-    Profile* profile) {
-  return static_cast<ExtensionSystemImpl::Shared*>(
+extensions::ExtensionSystemImpl::Shared*
+    ExtensionSystemSharedFactory::GetForProfile(Profile* profile) {
+  return static_cast<extensions::ExtensionSystemImpl::Shared*>(
       GetInstance()->GetServiceForProfile(profile, true));
 }
 
@@ -43,7 +43,7 @@ ExtensionSystemSharedFactory::~ExtensionSystemSharedFactory() {
 
 ProfileKeyedService* ExtensionSystemSharedFactory::BuildServiceInstanceFor(
     Profile* profile) const {
-  return new ExtensionSystemImpl::Shared(profile);
+  return new extensions::ExtensionSystemImpl::Shared(profile);
 }
 
 bool ExtensionSystemSharedFactory::ServiceRedirectedInIncognito() {
@@ -53,8 +53,9 @@ bool ExtensionSystemSharedFactory::ServiceRedirectedInIncognito() {
 // ExtensionSystemFactory
 
 // static
-ExtensionSystem* ExtensionSystemFactory::GetForProfile(Profile* profile) {
-  return static_cast<ExtensionSystem*>(
+extensions::ExtensionSystem* ExtensionSystemFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<extensions::ExtensionSystem*>(
       GetInstance()->GetServiceForProfile(profile, true));
 }
 
@@ -75,7 +76,7 @@ ExtensionSystemFactory::~ExtensionSystemFactory() {
 
 ProfileKeyedService* ExtensionSystemFactory::BuildServiceInstanceFor(
     Profile* profile) const {
-  return new ExtensionSystemImpl(profile);
+  return new extensions::ExtensionSystemImpl(profile);
 }
 
 bool ExtensionSystemFactory::ServiceHasOwnInstanceInIncognito() {