Hide inference hints. Fixes #24563.

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

Index: pkg/analyzer/lib/src/generated/engine.dart
diff --git a/pkg/analyzer/lib/src/generated/engine.dart b/pkg/analyzer/lib/src/generated/engine.dart
index 9be1f2d74a84f381e3e4dd6fe0982854fd0ea449..adf0e349f749a441f8a010983bbfdb50bba217e8 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -1170,6 +1170,9 @@ class AnalysisContextImpl implements InternalAnalysisContext {
         (this._options.hint && !options.hint) ||
         this._options.preserveComments != options.preserveComments ||
         this._options.strongMode != options.strongMode ||
+        ((options is AnalysisOptionsImpl)
+            ? this._options.strongModeHints != options.strongModeHints
+            : false) ||
         this._options.enableStrictCallChecks !=
             options.enableStrictCallChecks ||
         this._options.enableSuperMixins != options.enableSuperMixins;
@@ -1206,6 +1209,9 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     this._options.lint = options.lint;
     this._options.preserveComments = options.preserveComments;
     this._options.strongMode = options.strongMode;
+    if (options is AnalysisOptionsImpl) {
+      this._options.strongModeHints = options.strongModeHints;
+    }
     _generateImplicitErrors = options.generateImplicitErrors;
     _generateSdkErrors = options.generateSdkErrors;
     if (needsRecompute) {
@@ -6462,6 +6468,14 @@ class AnalysisOptionsImpl implements AnalysisOptions {
   bool strongMode = false;
 
   /**
+   * A flag indicating whether strong-mode inference hints should be
+   * used.  This flag is not exposed in the interface, and should be
+   * replaced by something more general.
+   * TODO(leafp): replace this with something more general

[Jennifer Messerly, 2015/12/02 20:37:18]

nit: I think this usually goes outside of the doc comment 

[Leaf, 2015/12/02 21:07:38]

Done.

+   */
+  bool strongModeHints = false;
+
+  /**
    * Initialize a newly created set of analysis options to have their default
    * values.
    */
@@ -6488,6 +6502,9 @@ class AnalysisOptionsImpl implements AnalysisOptions {
     lint = options.lint;
     preserveComments = options.preserveComments;
     strongMode = options.strongMode;
+    if (options is AnalysisOptionsImpl) {
+      strongModeHints = options.strongModeHints;
+    }
   }
 
   /**
@@ -6510,6 +6527,9 @@ class AnalysisOptionsImpl implements AnalysisOptions {
     lint = options.lint;
     preserveComments = options.preserveComments;
     strongMode = options.strongMode;
+    if (options is AnalysisOptionsImpl) {
+      strongModeHints = options.strongModeHints;
+    }
   }
 
   bool get analyzeFunctionBodies {