Drop ambiguous MaybeHandle comparison and hashing ops.

src/compiler/js-operator.h

 // Copyright 2013 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_COMPILER_JS_OPERATOR_H_
 #define V8_COMPILER_JS_OPERATOR_H_
 
 #include "src/runtime/runtime.h"
 #include "src/unique.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
 class Operator;
 struct JSOperatorGlobalCache;
 
 
 // Defines a pair of {TypeFeedbackVector} and {TypeFeedbackVectorICSlot}, which
 // is used to access the type feedback for a certain {Node}.
 class VectorSlotPair {
  public:
   VectorSlotPair() : slot_(FeedbackVectorICSlot::Invalid()) {}
   VectorSlotPair(Handle<TypeFeedbackVector> vector, FeedbackVectorICSlot slot)
       : vector_(vector), slot_(slot) {}
 
   bool IsValid() const { return !vector_.is_null(); }
 
-  MaybeHandle<TypeFeedbackVector> vector() const { return vector_; }
+  Handle<TypeFeedbackVector> vector() const { return vector_; }
   FeedbackVectorICSlot slot() const { return slot_; }
 
   int index() const {
-    Handle<TypeFeedbackVector> vector;
-    return vector_.ToHandle(&vector) ? vector->GetIndex(slot_) : -1;
+    return vector_.is_null() ? -1 : vector_->GetIndex(slot_);
   }
 
  private:
-  const MaybeHandle<TypeFeedbackVector> vector_;
+  const Handle<TypeFeedbackVector> vector_;
   const FeedbackVectorICSlot slot_;
 };
 
 bool operator==(VectorSlotPair const&, VectorSlotPair const&);
 bool operator!=(VectorSlotPair const&, VectorSlotPair const&);
 
 size_t hash_value(VectorSlotPair const&);
 
 enum TailCallMode { NO_TAIL_CALLS, ALLOW_TAIL_CALLS };
 
@@ skipping 497 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(JSOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_OPERATOR_H_