[Apps Developer Tool] Show installation warnings as chrome://extensions.

chrome/browser/extensions/api/developer_private/developer_private_api.cc

Index: chrome/browser/extensions/api/developer_private/developer_private_api.cc
diff --git a/chrome/browser/extensions/api/developer_private/developer_private_api.cc b/chrome/browser/extensions/api/developer_private/developer_private_api.cc
index b6c766ac7cce0a6ae90a5b0aa8f524252bee798c..d5bd6ea45f3e3a335d30ca4d2bc3407c5a72c69a 100644
--- a/chrome/browser/extensions/api/developer_private/developer_private_api.cc
+++ b/chrome/browser/extensions/api/developer_private/developer_private_api.cc
@@ -53,6 +53,7 @@
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_resource.h"
+#include "extensions/common/install_warning.h"
 #include "extensions/common/switches.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
@@ -299,6 +300,14 @@ scoped_ptr<developer::ItemInfo>
   if (Manifest::IsUnpackedLocation(item.location())) {
     info->path.reset(
         new std::string(UTF16ToUTF8(item.path().LossyDisplayName())));
+    for (std::vector<extensions::InstallWarning>::const_iterator it =
+             item.install_warnings().begin();
+         it != item.install_warnings().end(); ++it) {
+      developer::InstallWarning* warning = new developer::InstallWarning();
+      warning->is_html = (it->format == InstallWarning::FORMAT_HTML);
+      warning->message = it->message;
+      info->install_warnings.push_back(make_linked_ptr(warning));
+    }
   }
 
   info->incognito_enabled = service->IsIncognitoEnabled(item.id());