Replace SmartArrayPointer<T> with unique_ptr<T[]>

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 1ef9703be013bb7790d1c1f494bb60ad0ea52e53..383fd4c783595e6260d44a8445e136ae2af55208 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6,6 +6,7 @@
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
+#include <memory>
 
 #include "src/assert-scope.h"
 #include "src/bailout-reason.h"
@@ -9051,11 +9052,10 @@ class String: public Name {
   // ROBUST_STRING_TRAVERSAL invokes behaviour that is robust  This means it
   // handles unexpected data without causing assert failures and it does not
   // do any heap allocations.  This is useful when printing stack traces.
-  base::SmartArrayPointer<char> ToCString(AllowNullsFlag allow_nulls,
-                                          RobustnessFlag robustness_flag,
-                                          int offset, int length,
-                                          int* length_output = 0);
-  base::SmartArrayPointer<char> ToCString(
+  std::unique_ptr<char[]> ToCString(AllowNullsFlag allow_nulls,
+                                    RobustnessFlag robustness_flag, int offset,
+                                    int length, int* length_output = 0);
+  std::unique_ptr<char[]> ToCString(
       AllowNullsFlag allow_nulls = DISALLOW_NULLS,
       RobustnessFlag robustness_flag = FAST_STRING_TRAVERSAL,
       int* length_output = 0);