Show import for import of parts.

pkg/compiler/lib/src/diagnostics/messages.dart

Index: pkg/compiler/lib/src/diagnostics/messages.dart
diff --git a/pkg/compiler/lib/src/diagnostics/messages.dart b/pkg/compiler/lib/src/diagnostics/messages.dart
index 7445a04d254c7344efc8d0ea1fc9ab0a97b2f5b3..31c7070dbead320300f78db035e3b1ec026b1055 100644
--- a/pkg/compiler/lib/src/diagnostics/messages.dart
+++ b/pkg/compiler/lib/src/diagnostics/messages.dart
@@ -234,6 +234,7 @@ enum MessageKind {
   IMPORT_BEFORE_PARTS,
   IMPORT_EXPERIMENTAL_MIRRORS,
   IMPORT_PART_OF,
+  IMPORT_PART_OF_HERE,
   IMPORTED_HERE,
   INHERIT_GETTER_AND_METHOD,
   INHERITED_EXPLICIT_GETTER,
@@ -1954,6 +1955,10 @@ main() {}
 part of library;
 """}]),
 
+      MessageKind.IMPORT_PART_OF_HERE:
+        const MessageTemplate(MessageKind.IMPORT_PART_OF_HERE,
+          "The library is imported here."),
+
       MessageKind.LIBRARY_NAME_MISMATCH:
         const MessageTemplate(MessageKind.LIBRARY_NAME_MISMATCH,
           "Expected part of library name '#{libraryName}'.",