Move Extension Location and Type enums to Manifest, and move InstallWarning to its own file.

chrome/common/extensions/features/feature.cc

Index: chrome/common/extensions/features/feature.cc
diff --git a/chrome/common/extensions/features/feature.cc b/chrome/common/extensions/features/feature.cc
index b20efda3b75c2267302fd270f69cd0d12866818e..c245468ec8daad711d15f7aca9a5124954803d4a 100644
--- a/chrome/common/extensions/features/feature.cc
+++ b/chrome/common/extensions/features/feature.cc
@@ -13,7 +13,6 @@
 #include "chrome/common/chrome_switches.h"
 
 using chrome::VersionInfo;
-using extensions::Extension;
 
 namespace {
 
@@ -34,8 +33,8 @@ Feature::Platform Feature::GetCurrentPlatform() {
 }
 
 // static
-Feature::Location Feature::ConvertLocation(Extension::Location location) {
-  if (location == Extension::COMPONENT)
+Feature::Location Feature::ConvertLocation(Manifest::Location location) {
+  if (location == Manifest::COMPONENT)
     return COMPONENT_LOCATION;
   else
     return UNSPECIFIED_LOCATION;