Cherry-pick r44373, r44378, and r44275.

pkg/analysis_server/lib/src/operation/operation_analysis.dart

Index: pkg/analysis_server/lib/src/operation/operation_analysis.dart
diff --git a/pkg/analysis_server/lib/src/operation/operation_analysis.dart b/pkg/analysis_server/lib/src/operation/operation_analysis.dart
index ecbb97c4b232f11cef877c2d1a0d478916c8aee8..1074e75e3953a7b34f1ef92901f8461a30e54a8d 100644
--- a/pkg/analysis_server/lib/src/operation/operation_analysis.dart
+++ b/pkg/analysis_server/lib/src/operation/operation_analysis.dart
@@ -43,35 +43,35 @@ void scheduleNotificationOperations(AnalysisServer server, String file,
     if (server.hasAnalysisSubscription(
         protocol.AnalysisService.HIGHLIGHTS, file)) {
       server.scheduleOperation(
-          new _DartHighlightsOperation(file, resolvedDartUnit));
+          new _DartHighlightsOperation(context, file, resolvedDartUnit));
     }
     if (server.hasAnalysisSubscription(
         protocol.AnalysisService.NAVIGATION, file)) {
       server.scheduleOperation(
-          new _DartNavigationOperation(file, resolvedDartUnit));
+          new _DartNavigationOperation(context, file, resolvedDartUnit));
     }
     if (server.hasAnalysisSubscription(
         protocol.AnalysisService.OCCURRENCES, file)) {
       server.scheduleOperation(
-          new _DartOccurrencesOperation(file, resolvedDartUnit));
+          new _DartOccurrencesOperation(context, file, resolvedDartUnit));
     }
     if (server.hasAnalysisSubscription(
         protocol.AnalysisService.OVERRIDES, file)) {
       server.scheduleOperation(
-          new _DartOverridesOperation(file, resolvedDartUnit));
+          new _DartOverridesOperation(context, file, resolvedDartUnit));
     }
   }
   if (dartUnit != null) {
     if (server.hasAnalysisSubscription(
         protocol.AnalysisService.OUTLINE, file)) {
       server.scheduleOperation(
-          new _DartOutlineOperation(file, lineInfo, dartUnit));
+          new _DartOutlineOperation(context, file, lineInfo, dartUnit));
     }
   }
   // errors
   if (server.shouldSendErrorsNotificationFor(file)) {
     server.scheduleOperation(
-        new _NotificationErrorsOperation(file, lineInfo, errors));
+        new _NotificationErrorsOperation(context, file, lineInfo, errors));
   }
 }
 
@@ -88,6 +88,16 @@ void sendAnalysisNotificationErrors(AnalysisServer server, String file,
   });
 }
 
+void sendAnalysisNotificationFlushResults(
+    AnalysisServer server, List<String> files) {
+  _sendNotification(server, () {
+    if (files != null && files.isNotEmpty) {
+      var params = new protocol.AnalysisFlushResultsParams(files);
+      server.sendNotification(params.toNotification());
+    }
+  });
+}
+
 void sendAnalysisNotificationHighlights(
     AnalysisServer server, String file, CompilationUnit dartUnit) {
   _sendNotification(server, () {
@@ -156,10 +166,10 @@ class PerformAnalysisOperation extends ServerOperation {
   static const int IDLE_CACHE_SIZE = AnalysisOptionsImpl.DEFAULT_CACHE_SIZE;
   static const int WORKING_CACHE_SIZE = 512;
 
-  final AnalysisContext context;
   final bool isContinue;
 
-  PerformAnalysisOperation(this.context, this.isContinue);
+  PerformAnalysisOperation(AnalysisContext context, this.isContinue)
+      : super(context);
 
   @override
   ServerOperationPriority get priority {
@@ -266,8 +276,9 @@ class PerformAnalysisOperation extends ServerOperation {
 }
 
 class _DartHighlightsOperation extends _DartNotificationOperation {
-  _DartHighlightsOperation(String file, CompilationUnit unit)
-      : super(file, unit);
+  _DartHighlightsOperation(
+      AnalysisContext context, String file, CompilationUnit unit)
+      : super(context, file, unit);
 
   @override
   void perform(AnalysisServer server) {
@@ -276,10 +287,10 @@ class _DartHighlightsOperation extends _DartNotificationOperation {
 }
 
 class _DartIndexOperation extends _SingleFileOperation {
-  final AnalysisContext context;
   final CompilationUnit unit;
 
-  _DartIndexOperation(this.context, String file, this.unit) : super(file);
+  _DartIndexOperation(AnalysisContext context, String file, this.unit)
+      : super(context, file);
 
   @override
   ServerOperationPriority get priority {
@@ -296,8 +307,9 @@ class _DartIndexOperation extends _SingleFileOperation {
 }
 
 class _DartNavigationOperation extends _DartNotificationOperation {
-  _DartNavigationOperation(String file, CompilationUnit unit)
-      : super(file, unit);
+  _DartNavigationOperation(
+      AnalysisContext context, String file, CompilationUnit unit)
+      : super(context, file, unit);
 
   @override
   void perform(AnalysisServer server) {
@@ -308,7 +320,8 @@ class _DartNavigationOperation extends _DartNotificationOperation {
 abstract class _DartNotificationOperation extends _SingleFileOperation {
   final CompilationUnit unit;
 
-  _DartNotificationOperation(String file, this.unit) : super(file);
+  _DartNotificationOperation(AnalysisContext context, String file, this.unit)
+      : super(context, file);
 
   @override
   ServerOperationPriority get priority {
@@ -317,8 +330,9 @@ abstract class _DartNotificationOperation extends _SingleFileOperation {
 }
 
 class _DartOccurrencesOperation extends _DartNotificationOperation {
-  _DartOccurrencesOperation(String file, CompilationUnit unit)
-      : super(file, unit);
+  _DartOccurrencesOperation(
+      AnalysisContext context, String file, CompilationUnit unit)
+      : super(context, file, unit);
 
   @override
   void perform(AnalysisServer server) {
@@ -329,8 +343,9 @@ class _DartOccurrencesOperation extends _DartNotificationOperation {
 class _DartOutlineOperation extends _DartNotificationOperation {
   final LineInfo lineInfo;
 
-  _DartOutlineOperation(String file, this.lineInfo, CompilationUnit unit)
-      : super(file, unit);
+  _DartOutlineOperation(
+      AnalysisContext context, String file, this.lineInfo, CompilationUnit unit)
+      : super(context, file, unit);
 
   @override
   void perform(AnalysisServer server) {
@@ -339,8 +354,9 @@ class _DartOutlineOperation extends _DartNotificationOperation {
 }
 
 class _DartOverridesOperation extends _DartNotificationOperation {
-  _DartOverridesOperation(String file, CompilationUnit unit)
-      : super(file, unit);
+  _DartOverridesOperation(
+      AnalysisContext context, String file, CompilationUnit unit)
+      : super(context, file, unit);
 
   @override
   void perform(AnalysisServer server) {
@@ -349,10 +365,10 @@ class _DartOverridesOperation extends _DartNotificationOperation {
 }
 
 class _HtmlIndexOperation extends _SingleFileOperation {
-  final AnalysisContext context;
   final HtmlUnit unit;
 
-  _HtmlIndexOperation(this.context, String file, this.unit) : super(file);
+  _HtmlIndexOperation(AnalysisContext context, String file, this.unit)
+      : super(context, file);
 
   @override
   ServerOperationPriority get priority {
@@ -370,8 +386,9 @@ class _NotificationErrorsOperation extends _SingleFileOperation {
   final LineInfo lineInfo;
   final List<AnalysisError> errors;
 
-  _NotificationErrorsOperation(String file, this.lineInfo, this.errors)
-      : super(file);
+  _NotificationErrorsOperation(
+      AnalysisContext context, String file, this.lineInfo, this.errors)
+      : super(context, file);
 
   @override
   ServerOperationPriority get priority {
@@ -387,7 +404,7 @@ class _NotificationErrorsOperation extends _SingleFileOperation {
 abstract class _SingleFileOperation extends SourceSensitiveOperation {
   final String file;
 
-  _SingleFileOperation(this.file);
+  _SingleFileOperation(AnalysisContext context, this.file) : super(context);
 
   @override
   bool shouldBeDiscardedOnSourceChange(Source source) {