Remove informational message

pkg/analyzer/lib/src/generated/source.dart

Index: pkg/analyzer/lib/src/generated/source.dart
diff --git a/pkg/analyzer/lib/src/generated/source.dart b/pkg/analyzer/lib/src/generated/source.dart
index 8c5015abe2b43f56d85f83fa204808f04a87fae5..f90049b7d56694bae16cdb5748d4c6b5abe09e34 100644
--- a/pkg/analyzer/lib/src/generated/source.dart
+++ b/pkg/analyzer/lib/src/generated/source.dart
@@ -739,14 +739,11 @@ class SourceFactory {
   bool isLocalSource(Source source) => _localSourcePredicate.isLocal(source);
 
   /**
-   * Return a source object representing the URI that results from resolving the given (possibly
-   * relative) contained URI against the URI associated with an existing source object, whether or
-   * not the resulting source exists, or `null` if either the contained URI is invalid or if
-   * it cannot be resolved against the source object's URI.
-   *
-   * @param containingSource the source containing the given URI
-   * @param containedUri the (possibly relative) URI to be resolved against the containing source
-   * @return the source representing the contained URI
+   * Return a source representing the URI that results from resolving the given
+   * (possibly relative) [containedUri] against the URI associated with the
+   * [containingSource], whether or not the resulting source exists, or `null`
+   * if either the [containedUri] is invalid or if it cannot be resolved against
+   * the [containingSource]'s URI.
    */
   Source resolveUri(Source containingSource, String containedUri) {
     if (containedUri == null || containedUri.isEmpty) {
@@ -756,6 +753,8 @@ class SourceFactory {
       // Force the creation of an escaped URI to deal with spaces, etc.
       return _internalResolveUri(
           containingSource, parseUriWithException(containedUri));
+    } on URISyntaxException {
+      return null;
     } catch (exception, stackTrace) {
       String containingFullName =
           containingSource != null ? containingSource.fullName : '<null>';