Move getElementAt() to CompilationUnitElement.

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

Index: pkg/analyzer/lib/src/generated/element_handle.dart
diff --git a/pkg/analyzer/lib/src/generated/element_handle.dart b/pkg/analyzer/lib/src/generated/element_handle.dart
index 4c5acae3b40f26eb7608c47dfdb4115b53581b72..0cb42ece90c3e8a59aa56eba7523ead91a1601f0 100644
--- a/pkg/analyzer/lib/src/generated/element_handle.dart
+++ b/pkg/analyzer/lib/src/generated/element_handle.dart
@@ -219,6 +219,11 @@ class CompilationUnitElementHandle extends ElementHandle
   int get uriOffset => actualElement.uriOffset;
 
   @override
+  Element getElementAt(int offset) {
+    return actualElement.getElementAt(offset);
+  }
+
+  @override
   ClassElement getEnum(String enumName) => actualElement.getEnum(enumName);
 
   @override
@@ -803,9 +808,6 @@ class LibraryElementHandle extends ElementHandle implements LibraryElement {
   List<LibraryElement> get visibleLibraries => actualElement.visibleLibraries;
 
   @override
-  Element getElementAt(int offset) => actualElement.getElementAt(offset);
-
-  @override
   List<ImportElement> getImportsWithPrefix(PrefixElement prefixElement) =>
       actualElement.getImportsWithPrefix(prefixElement);