Convert //cc from scoped_ptr to std::unique_ptr.

cc/PRESUBMIT.py

Index: cc/PRESUBMIT.py
diff --git a/cc/PRESUBMIT.py b/cc/PRESUBMIT.py
index d79ca8005f7f40fa4365f969b21d04b84a9f1ba5..dc114b713adc7e9fb68148faca4a8fc038d3f751 100644
--- a/cc/PRESUBMIT.py
+++ b/cc/PRESUBMIT.py
@@ -162,20 +162,20 @@ def CheckScopedPtr(input_api, output_api,
   for f in input_api.AffectedSourceFiles(source_file_filter):
     for line_number, line in f.ChangedContents():
       # Disallow:
-      # return scoped_ptr<T>(foo);
-      # bar = scoped_ptr<T>(foo);
+      # return std::unique_ptr<T>(foo);
+      # bar = std::unique_ptr<T>(foo);
       # But allow:
-      # return scoped_ptr<T[]>(foo);
-      # bar = scoped_ptr<T[]>(foo);
-      if re.search(r'(=|\breturn)\s*scoped_ptr<.*?(?<!])>\([^)]+\)', line):
+      # return std::unique_ptr<T[]>(foo);
+      # bar = std::unique_ptr<T[]>(foo);
+      if re.search(r'(=|\breturn)\s*std::unique_ptr<.*?(?<!])>\([^)]+\)', line):
         errors.append(output_api.PresubmitError(
           ('%s:%d uses explicit scoped_ptr constructor. ' +
-           'Use make_scoped_ptr() instead.') % (f.LocalPath(), line_number)))
+           'Use base::WrapUnique() instead.') % (f.LocalPath(), line_number)))
       # Disallow:
-      # scoped_ptr<T>()
-      if re.search(r'\bscoped_ptr<.*?>\(\)', line):
+      # std::unique_ptr<T>()
+      if re.search(r'\bstd::unique_ptr<.*?>\(\)', line):
         errors.append(output_api.PresubmitError(
-          '%s:%d uses scoped_ptr<T>(). Use nullptr instead.' %
+          '%s:%d uses std::unique_ptr<T>(). Use nullptr instead.' %
           (f.LocalPath(), line_number)))
   return errors