Move tree fixer to graph package.

This is purely a move/rename refactor.

Change-Id: If117dbf79ddb3a3d48d7a1a08173976e092f8582
diff --git a/src/main/java/com/android/tools/r8/repackaging/RepackagingTreeFixer.java b/src/main/java/com/android/tools/r8/graph/TreeFixer.java
similarity index 91%
rename from src/main/java/com/android/tools/r8/repackaging/RepackagingTreeFixer.java
rename to src/main/java/com/android/tools/r8/graph/TreeFixer.java
index 7e029e1..aa3597e 100644
--- a/src/main/java/com/android/tools/r8/repackaging/RepackagingTreeFixer.java
+++ b/src/main/java/com/android/tools/r8/graph/TreeFixer.java
@@ -2,41 +2,27 @@
 // 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.
 
-package com.android.tools.r8.repackaging;
+package com.android.tools.r8.graph;
 
-import com.android.tools.r8.graph.AppView;
-import com.android.tools.r8.graph.DexEncodedField;
-import com.android.tools.r8.graph.DexEncodedMethod;
-import com.android.tools.r8.graph.DexField;
-import com.android.tools.r8.graph.DexItemFactory;
-import com.android.tools.r8.graph.DexMethod;
-import com.android.tools.r8.graph.DexProgramClass;
-import com.android.tools.r8.graph.DexProto;
-import com.android.tools.r8.graph.DexType;
-import com.android.tools.r8.graph.DexTypeList;
-import com.android.tools.r8.graph.EnclosingMethodAttribute;
-import com.android.tools.r8.graph.InnerClassAttribute;
-import com.android.tools.r8.graph.NestHostClassAttribute;
-import com.android.tools.r8.graph.NestMemberClassAttribute;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.Map;
 
-public class RepackagingTreeFixer {
+public class TreeFixer {
 
   private final AppView<?> appView;
   private final DexItemFactory dexItemFactory;
   private final Map<DexType, DexType> repackagedClasses;
-  private final TreeFixingCallbacks callbacks;
+  private final TreeFixerCallbacks callbacks;
 
   private final Map<DexType, DexProgramClass> newProgramClasses = new IdentityHashMap<>();
   private final Map<DexType, DexProgramClass> synthesizedFromClasses = new IdentityHashMap<>();
   private final Map<DexProto, DexProto> protoFixupCache = new IdentityHashMap<>();
 
-  public RepackagingTreeFixer(
-      AppView<?> appView, Map<DexType, DexType> repackagedClasses, TreeFixingCallbacks callbacks) {
+  public TreeFixer(
+      AppView<?> appView, Map<DexType, DexType> repackagedClasses, TreeFixerCallbacks callbacks) {
     this.appView = appView;
     this.dexItemFactory = appView.dexItemFactory();
     this.repackagedClasses = repackagedClasses;
diff --git a/src/main/java/com/android/tools/r8/repackaging/TreeFixingCallbacks.java b/src/main/java/com/android/tools/r8/graph/TreeFixerCallbacks.java
similarity index 62%
rename from src/main/java/com/android/tools/r8/repackaging/TreeFixingCallbacks.java
rename to src/main/java/com/android/tools/r8/graph/TreeFixerCallbacks.java
index 6447936..bb7f3cf 100644
--- a/src/main/java/com/android/tools/r8/repackaging/TreeFixingCallbacks.java
+++ b/src/main/java/com/android/tools/r8/graph/TreeFixerCallbacks.java
@@ -1,13 +1,9 @@
 // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file
 // 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.
-package com.android.tools.r8.repackaging;
+package com.android.tools.r8.graph;
 
-import com.android.tools.r8.graph.DexField;
-import com.android.tools.r8.graph.DexMethod;
-import com.android.tools.r8.graph.DexType;
-
-public interface TreeFixingCallbacks {
+public interface TreeFixerCallbacks {
 
   void recordMove(DexField from, DexField to);
 
diff --git a/src/main/java/com/android/tools/r8/repackaging/Repackaging.java b/src/main/java/com/android/tools/r8/repackaging/Repackaging.java
index 221d175..9510772 100644
--- a/src/main/java/com/android/tools/r8/repackaging/Repackaging.java
+++ b/src/main/java/com/android/tools/r8/repackaging/Repackaging.java
@@ -20,6 +20,8 @@
 import com.android.tools.r8.graph.ProgramPackage;
 import com.android.tools.r8.graph.ProgramPackageCollection;
 import com.android.tools.r8.graph.SortedProgramPackageCollection;
+import com.android.tools.r8.graph.TreeFixer;
+import com.android.tools.r8.graph.TreeFixerCallbacks;
 import com.android.tools.r8.shaking.AnnotationFixer;
 import com.android.tools.r8.shaking.AppInfoWithLiveness;
 import com.android.tools.r8.shaking.ProguardConfiguration;
@@ -76,8 +78,8 @@
     // Running the tree fixer with an identity mapping helps ensure that the fixup of of items is
     // complete as the rewrite replaces all items regardless of repackaging.
     // The identity mapping should result in no move callbacks being called.
-    TreeFixingCallbacks callbacks =
-        new TreeFixingCallbacks() {
+    TreeFixerCallbacks callbacks =
+        new TreeFixerCallbacks() {
           @Override
           public void recordMove(DexField from, DexField to) {
             assert false;
@@ -94,7 +96,7 @@
           }
         };
     Collection<DexProgramClass> newProgramClasses =
-        new RepackagingTreeFixer(appView, Collections.emptyMap(), callbacks).run();
+        new TreeFixer(appView, Collections.emptyMap(), callbacks).run();
     CommittedItems committedItems =
         appView
             .getSyntheticItems()
@@ -140,7 +142,7 @@
     }
     RepackagingLens.Builder lensBuilder = new RepackagingLens.Builder();
     Collection<DexProgramClass> newProgramClasses =
-        new RepackagingTreeFixer(appView, mappings, lensBuilder).run();
+        new TreeFixer(appView, mappings, lensBuilder).run();
     appBuilder.replaceProgramClasses(new ArrayList<>(newProgramClasses));
     RepackagingLens lens = lensBuilder.build(appView);
     new AnnotationFixer(lens).run(appBuilder.getProgramClasses());
diff --git a/src/main/java/com/android/tools/r8/repackaging/RepackagingLens.java b/src/main/java/com/android/tools/r8/repackaging/RepackagingLens.java
index 2bcfb5b..04ae4a3 100644
--- a/src/main/java/com/android/tools/r8/repackaging/RepackagingLens.java
+++ b/src/main/java/com/android/tools/r8/repackaging/RepackagingLens.java
@@ -9,6 +9,7 @@
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.graph.DexType;
 import com.android.tools.r8.graph.GraphLens.NestedGraphLens;
+import com.android.tools.r8.graph.TreeFixerCallbacks;
 import com.android.tools.r8.shaking.AppInfoWithLiveness;
 import com.android.tools.r8.utils.collections.BidirectionalOneToOneHashMap;
 import com.android.tools.r8.utils.collections.BidirectionalOneToOneMap;
@@ -46,7 +47,7 @@
     return originalTypes.get(to) == from || super.isSimpleRenaming(from, to);
   }
 
-  public static class Builder implements TreeFixingCallbacks {
+  public static class Builder implements TreeFixerCallbacks {
 
     protected final BiMap<DexType, DexType> originalTypes = HashBiMap.create();
     protected final MutableBidirectionalOneToOneMap<DexField, DexField> newFieldSignatures =