Add a UniqueVector class to GN

tools/gn/builder.h

 // Copyright (c) 2013 The Chromium 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 TOOLS_GN_BUILDER_H_
 #define TOOLS_GN_BUILDER_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "tools/gn/builder_record.h"
 #include "tools/gn/label.h"
 #include "tools/gn/label_ptr.h"
+#include "tools/gn/unique_vector.h"
 
 class Config;
 class Err;
 class Loader;
 class ParseNode;
 
 class Builder : public base::RefCountedThreadSafe<Builder> {
  public:
   typedef base::Callback<void(const BuilderRecord*)> ResolvedCallback;
 
@@ skipping 52 matching lines @@
   // will be set. request_from is used as the source of the error.
   BuilderRecord* GetResolvedRecordOfType(const Label& label,
                                          const ParseNode* request_from,
                                          BuilderRecord::ItemType type,
                                          Err* err);
 
   bool AddDeps(BuilderRecord* record,
                const LabelConfigVector& configs,
                Err* err);
   bool AddDeps(BuilderRecord* record,
+               const UniqueVector<LabelConfigPair>& configs,
+               Err* err);
+  bool AddDeps(BuilderRecord* record,
                const LabelTargetVector& targets,
                Err* err);
   bool AddToolchainDep(BuilderRecord* record,
                        const Target* target,
                        Err* err);
 
   // Given a target, sets the "should generate" bit and pushes it through the
   // dependency tree. Any time the bit it set, we ensure that the given item is
   // scheduled to be loaded.
   //
   // If the force flag is set, we'll ignore the current state of the record's
   // should_generate flag, and set it on the dependents every time. This is
   // used when defining a target: the "should generate" may have been set
   // before the item was defined (if it is required by something that is
   // required). In this case, we need to re-push the "should generate" flag
   // to the item's dependencies.
   void RecursiveSetShouldGenerate(BuilderRecord* record, bool force);
 
   void ScheduleItemLoadIfNecessary(BuilderRecord* record);
 
   // This takes a BuilderRecord with resolved depdencies, and fills in the
   // target's Label*Vectors with the resolved pointers.
   bool ResolveItem(BuilderRecord* record, Err* err);
 
   // Fills in the pointers in the given vector based on the labels. We assume
   // that everything should be resolved by this point, so will return an error
   // if anything isn't found or if the type doesn't match.
   bool ResolveDeps(LabelTargetVector* deps, Err* err);
-  bool ResolveConfigs(LabelConfigVector* configs, Err* err);
+  bool ResolveConfigs(UniqueVector<LabelConfigPair>* configs, Err* err);
   bool ResolveForwardDependentConfigs(Target* target, Err* err);
 
   // Given a list of unresolved records, tries to find any circular
   // dependencies and returns the string describing the problem. If no circular
   // deps were found, returns the empty string.
   std::string CheckForCircularDependencies(
       const std::vector<const BuilderRecord*>& bad_records) const;
 
   // Non owning pointer.
   Loader* loader_;
 
   // Owning pointers.
   typedef base::hash_map<Label, BuilderRecord*> RecordMap;
   RecordMap records_;
 
   ResolvedCallback resolved_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 #endif  // TOOLS_GN_BUILDER_H_