Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/computed_hashes.h

Index: extensions/browser/computed_hashes.h
diff --git a/extensions/browser/computed_hashes.h b/extensions/browser/computed_hashes.h
index 071abf08767c62d2d69bc882d917d84f606a8da5..0451640e9a3f8c1869faf16935350744f32795dd 100644
--- a/extensions/browser/computed_hashes.h
+++ b/extensions/browser/computed_hashes.h
@@ -8,10 +8,10 @@
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
-#include "base/memory/scoped_ptr.h"
 
 namespace base {
 class FilePath;
@@ -59,7 +59,7 @@ class ComputedHashes {
    private:
     // Each element of this list contains the path and block hashes for one
     // file.
-    scoped_ptr<base::ListValue> file_list_;
+    std::unique_ptr<base::ListValue> file_list_;
   };
 
   // Computes the SHA256 hash of each |block_size| chunk in |contents|, placing