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

chrome/browser/extensions/image_loading_tracker.cc

Index: chrome/browser/extensions/image_loading_tracker.cc
diff --git a/chrome/browser/extensions/image_loading_tracker.cc b/chrome/browser/extensions/image_loading_tracker.cc
index d519878ff34bd363acfc887ed9ab4d9b2a10fc21..7f64e6244ec5edd4a32613af8375e5c7738f7ca5 100644
--- a/chrome/browser/extensions/image_loading_tracker.cc
+++ b/chrome/browser/extensions/image_loading_tracker.cc
@@ -28,6 +28,7 @@
 
 using content::BrowserThread;
 using extensions::Extension;
+using extensions::Manifest;
 
 namespace {
 
@@ -306,7 +307,7 @@ void ImageLoadingTracker::LoadImages(
       loader_ = new ImageLoader(this);
 
     int resource_id = -1;
-    if (extension->location() == Extension::COMPONENT &&
+    if (extension->location() == Manifest::COMPONENT &&
         extensions::ImageLoader::IsComponentExtensionResource(
             extension->path(), it->resource.relative_path(), &resource_id)) {
       loader_->LoadResource(*it, id, resource_id);