Rework "analysis.updateContent" analysis server request.

pkg/analysis_services/lib/constants.dart

Index: pkg/analysis_services/lib/constants.dart
diff --git a/pkg/analysis_services/lib/constants.dart b/pkg/analysis_services/lib/constants.dart
index bdff512f5278cf43d7156713ff208b9709777277..cf2e837be79f2cf0f929d1f2818c8708e8dd8d38 100644
--- a/pkg/analysis_services/lib/constants.dart
+++ b/pkg/analysis_services/lib/constants.dart
@@ -7,7 +7,9 @@ library services.constants;
 //
 // Property names
 //
+const String ADD = 'add';
 const String ADDED = 'added';
+const String CHANGE = 'change';
 const String CHILDREN = 'children';
 const String CLASS_ELEMENT = 'classElement';
 const String CLASS_NAME = 'className';
@@ -51,7 +53,6 @@ const String MEMBER_ELEMENT = 'memberElement';
 const String MESSAGE = 'message';
 const String MIXINS = 'mixins';
 const String NAME = 'name';
-const String NEW_LENGTH = 'newLength';
 const String OCCURRENCES = 'occurrences';
 const String OFFSET = 'offset';
 const String OFFSETS = 'offsets';
@@ -68,8 +69,9 @@ const String PROPAGATED_TYPE = 'propagatedType';
 const String REFACTORINGS = 'refactorings';
 const String REGIONS = 'regions';
 const String RELEVANCE = 'relevance';
+const String REMOVE = 'remove';
 const String REMOVED = 'removed';
-const String REPLACEMENT = 'relacement';
+const String REPLACEMENT = 'replacement';
 const String REPLACEMENT_OFFSET = 'replacementOffset';
 const String REPLACEMENT_LENGTH = 'replacementLength';
 const String RETURN_TYPE = 'returnType';