Remove AnalysisCache, CachePartition, SdkCachePartition.

Change-Id: I8d6291f5292638571ae7dbf848f15acb2a9af8bb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/122283
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

Author: scheglov

pkg/analyzer/lib/src/context/cache.dart

@@ -2,11 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
-import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
 import 'package:analyzer/src/generated/source.dart';
 
 /**
@@ -87,32 +85,6 @@ class AnalysisContextImpl implements InternalAnalysisContext {
   TypeSystem get typeSystem {
     return _typeSystem ??= Dart2TypeSystem(typeProvider);
   }
-
-  /**
-   * Create an analysis cache based on the given source [factory].
-   */
-  AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
-    throw UnimplementedError();
-  }
-}
-
-/**
- * An object that manages the partitions that can be shared between analysis
- * contexts.
- */
-class PartitionManager {
-  /**
-   * Clear any cached data being maintained by this manager.
-   */
-  void clearCache() {}
-
-  /**
-   * Return the partition being used for the given [sdk], creating the partition
-   * if necessary.
-   */
-  SdkCachePartition forSdk(DartSdk sdk) {
-    throw UnimplementedError();
-  }
 }
 
 /**
@@ -134,9 +106,4 @@ class SdkAnalysisContext extends AnalysisContextImpl {
   void set analysisOptions(AnalysisOptions options) {
     throw new StateError('AnalysisOptions of SDK context cannot be changed.');
   }
-
-  @override
-  AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
-    throw UnimplementedError();
-  }
 }

pkg/analyzer/lib/src/context/context.dart

@@ -132,9 +132,6 @@ class AnalysisEngine {
   InstrumentationService _instrumentationService =
       InstrumentationService.NULL_SERVICE;
 
-  /// The partition manager being used to manage the shared partitions.
-  final PartitionManager partitionManager = new PartitionManager();
-
   AnalysisEngine._();
 
   /// Return the instrumentation service that is to be used by this analysis
@@ -164,7 +161,6 @@ class AnalysisEngine {
   /// Clear any caches holding on to analysis results so that a full re-analysis
   /// will be performed the next time an analysis context is created.
   void clearCaches() {
-    partitionManager.clearCache();
     // See https://github.com/dart-lang/sdk/issues/30314.
     StringToken.canonicalizer.clear();
   }

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

@@ -4,9 +4,7 @@
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
-import 'package:analyzer/src/generated/engine.dart' show AnalysisEngine;
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/idl.dart' show PackageBundle;
@@ -1100,13 +1098,4 @@ class _SdkAnalysisContext extends AnalysisContextImpl {
   final DartSdk sdk;
 
   _SdkAnalysisContext(this.sdk);
-
-  @override
-  AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
-    if (factory == null) {
-      return super.createCacheFromSourceFactory(factory);
-    }
-    return new AnalysisCache(
-        <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
-  }
 }