Basic multi-module support

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index b71f834947a741e666ec41a4f4af0c43dbe9cd28..dc377a3428564783f3e580918710b12480b7a016 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5254,6 +5254,12 @@ Make sure you do not expose any sensitive information.
       <message name="IDS_EXTENSION_INSTALL_UNEXPECTED_VERSION" desc="Error displayed during installation of a side-loaded app, extension, or theme when the version of the referenced extension does not match the version the developer declared during registration.">
         Expected version "<ph name="EXPECTED_VERSION">$1<ex>2.0</ex></ph>", but version was "<ph name="NEW_ID">$2<ex>1.0</ex></ph>".
       </message>
+      <message name="IDS_EXTENSION_INSTALL_DEPENDENCY_NOT_FOUND" desc="Error displayed during installation of an extension when an import dependency is not found.">
+        Required extension with ID "<ph name="IMPORT_ID">$1<ex>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</ex></ph>" and minimum version "<ph name="IMPORT_VERSION">$2<ex>1.0</ex></ph>" not found.
+      </message>
+      <message name="IDS_EXTENSION_INSTALL_DEPENDENCY_NOT_SHARED_MODULE" desc="Error displayed during installation of an extension which tries to imports resources from an extension which is not a shared module.">
+        Unable to import extension with ID "<ph name="IMPORT_ID">$1<ex>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</ex></ph>" because it is not a shared module.
+      </message>
       <message name="IDS_EXTENSION_OVERLAPPING_WEB_EXTENT" desc="Error message when a user tries to install an app with a web extent that overlaps another installed app.">
         Could not add application because it conflicts with "<ph name="APP_NAME">$1<ex>Google Mail</ex></ph>".
       </message>