Revert "Make JavaScriptBackend.processAnnotations element-model agnostic"

pkg/compiler/lib/src/inferrer/inferrer_engine.dart

Index: pkg/compiler/lib/src/inferrer/inferrer_engine.dart
diff --git a/pkg/compiler/lib/src/inferrer/inferrer_engine.dart b/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
index ca21ba8bbe3153668f82dd167a87a6ab19446e25..152f2f4e23d29d89175aa71889a9d1eb3ecec486 100644
--- a/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
+++ b/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
@@ -85,17 +85,6 @@ class InferrerEngine {
 
   CommonElements get commonElements => closedWorld.commonElements;
 
-  /// Returns `true` if [element] has an `@AssumeDynamic()` annotation.
-  bool assumeDynamic(Element element) {
-    return element is MemberElement && optimizerHints.assumeDynamic(element);
-  }
-
-  /// Returns `true` if [element] has an `@TrustTypeAnnotations()` annotation.
-  bool trustTypeAnnotations(Element element) {
-    return element is MemberElement &&
-        optimizerHints.trustTypeAnnotations(element);
-  }
-
   /**
    * Applies [f] to all elements in the universe that match
    * [selector] and [mask]. If [f] returns false, aborts the iteration.
@@ -237,7 +226,7 @@ class InferrerEngine {
   }
 
   JavaScriptBackend get backend => compiler.backend;
-  OptimizerHintsForTests get optimizerHints => backend.optimizerHints;
+  OptimizerHintsForTests get annotations => backend.annotations;
   DiagnosticReporter get reporter => compiler.reporter;
   CommonMasks get commonMasks => closedWorld.commonMasks;