Revert of Refactor compilation dependency handling.

src/compilation-dependencies.h

Index: src/compilation-dependencies.h
diff --git a/src/compilation-dependencies.h b/src/compilation-dependencies.h
deleted file mode 100644
index ddd0be83bdaa15e0f1caf292859df17cc9696257..0000000000000000000000000000000000000000
--- a/src/compilation-dependencies.h
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_DEPENDENCIES_H_
-#define V8_DEPENDENCIES_H_
-
-namespace v8 {
-namespace internal {
-
-// Collects dependencies for this compilation, e.g. assumptions about
-// stable maps, constant globals, etc.
-class CompilationDependencies {
- public:
-  CompilationDependencies(Isolate* isolate, Zone* zone)
-      : isolate_(isolate),
-        zone_(zone),
-        object_wrapper_(Handle<Foreign>::null()),
-        aborted_(false) {
-    std::fill_n(groups_, DependentCode::kGroupCount, nullptr);
-  }
-
-  void Insert(DependentCode::DependencyGroup group, Handle<HeapObject> handle);
-
-  void AssumeInitialMapCantChange(Handle<Map> map) {
-    Insert(DependentCode::kInitialMapChangedGroup, map);
-  }
-  void AssumeElementsCantBeAdded(Handle<Map> map) {
-    Insert(DependentCode::kElementsCantBeAddedGroup, map);
-  }
-  void AssumeFieldType(Handle<Map> map) {
-    Insert(DependentCode::kFieldTypeGroup, map);
-  }
-  void AssumePropertyCell(Handle<PropertyCell> cell) {
-    Insert(DependentCode::kPropertyCellChangedGroup, cell);
-  }
-  void AssumeTenuringDecision(Handle<AllocationSite> site) {
-    Insert(DependentCode::kAllocationSiteTenuringChangedGroup, site);
-  }
-  void AssumeTransitionStable(Handle<AllocationSite> site);
-
-  void Commit(Handle<Code> code);
-  void Rollback();
-  void Abort() { aborted_ = true; }
-  bool HasAborted() const { return aborted_; }
-
-  bool IsEmpty() const {
-    for (int i = 0; i < DependentCode::kGroupCount; i++) {
-      if (groups_[i]) return false;
-    }
-    return true;
-  }
-
- private:
-  Isolate* isolate_;
-  Zone* zone_;
-  Handle<Foreign> object_wrapper_;
-  bool aborted_;
-  ZoneList<Handle<HeapObject> >* groups_[DependentCode::kGroupCount];
-
-  DependentCode* Get(Handle<Object> object);
-  void Set(Handle<Object> object, Handle<DependentCode> dep);
-};
-}
-}  // namespace v8::internal
-
-#endif  // V8_DEPENDENCIES_H_