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

chrome/browser/extensions/api/app_window/app_window_api.cc

Index: chrome/browser/extensions/api/app_window/app_window_api.cc
diff --git a/chrome/browser/extensions/api/app_window/app_window_api.cc b/chrome/browser/extensions/api/app_window/app_window_api.cc
index d41f9f9c42ebfe466bfed0b9676efb2c7e44a350..b9c62c0e2c4c8795dc86a4aa3182a03a1554401a 100644
--- a/chrome/browser/extensions/api/app_window/app_window_api.cc
+++ b/chrome/browser/extensions/api/app_window/app_window_api.cc
@@ -88,7 +88,7 @@ bool AppWindowCreateFunction::RunImpl() {
   GURL url = GetExtension()->GetResourceURL(params->url);
   // Allow absolute URLs for component apps, otherwise prepend the extension
   // path.
-  if (GetExtension()->location() == extensions::Extension::COMPONENT) {
+  if (GetExtension()->location() == extensions::Manifest::COMPONENT) {
     GURL absolute = GURL(params->url);
     if (absolute.has_scheme())
       url = absolute;