Convert //base to use std::unique_ptr

base/process/process_metrics.h

Index: base/process/process_metrics.h
diff --git a/base/process/process_metrics.h b/base/process/process_metrics.h
index 9c868ccbce2b6aeec5e21144365bb66de0410cc1..8d4e51b517d78ed4cb497b983cadb8325f35addc 100644
--- a/base/process/process_metrics.h
+++ b/base/process/process_metrics.h
@@ -267,7 +267,7 @@ struct BASE_EXPORT SystemMemoryInfoKB {
   SystemMemoryInfoKB(const SystemMemoryInfoKB& other);
 
   // Serializes the platform specific fields to value.
-  scoped_ptr<Value> ToValue() const;
+  std::unique_ptr<Value> ToValue() const;
 
   int total;
   int free;
@@ -343,7 +343,7 @@ struct BASE_EXPORT SystemDiskInfo {
   SystemDiskInfo(const SystemDiskInfo& other);
 
   // Serializes the platform specific fields to value.
-  scoped_ptr<Value> ToValue() const;
+  std::unique_ptr<Value> ToValue() const;
 
   uint64_t reads;
   uint64_t reads_merged;
@@ -380,7 +380,7 @@ struct BASE_EXPORT SwapInfo {
   }
 
   // Serializes the platform specific fields to value.
-  scoped_ptr<Value> ToValue() const;
+  std::unique_ptr<Value> ToValue() const;
 
   uint64_t num_reads;
   uint64_t num_writes;
@@ -404,7 +404,7 @@ class SystemMetrics {
   static SystemMetrics Sample();
 
   // Serializes the system metrics to value.
-  scoped_ptr<Value> ToValue() const;
+  std::unique_ptr<Value> ToValue() const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(SystemMetricsTest, SystemMetrics);