Make base::Environment::Create() return unique_ptrs.

chrome/browser/shell_integration_linux_unittest.cc

 // Copyright 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.
 
 #include "chrome/browser/shell_integration_linux.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <cstdlib>
@@ skipping 23 matching lines @@
 
 namespace shell_integration_linux {
 
 namespace {
 
 // Provides mock environment variables values based on a stored map.
 class MockEnvironment : public base::Environment {
  public:
   MockEnvironment() {}
 
-  void Set(const std::string& name, const std::string& value) {
-    variables_[name] = value;
+  void Set(base::StringPiece name, const std::string& value) {
+    variables_[name.as_string()] = value;
   }
 
-  bool GetVar(const char* variable_name, std::string* result) override {
-    if (ContainsKey(variables_, variable_name)) {
-      *result = variables_[variable_name];
+  bool GetVar(base::StringPiece variable_name, std::string* result) override {
+    if (ContainsKey(variables_, variable_name.as_string())) {
+      *result = variables_[variable_name.as_string()];
       return true;
     }
 
     return false;
   }
 
-  bool SetVar(const char* variable_name,
+  bool SetVar(base::StringPiece variable_name,
               const std::string& new_value) override {
     ADD_FAILURE();
     return false;
   }
 
-  bool UnSetVar(const char* variable_name) override {
+  bool UnSetVar(base::StringPiece variable_name) override {
     ADD_FAILURE();
     return false;
   }
 
  private:
   std::map<std::string, std::string> variables_;
 
   DISALLOW_COPY_AND_ASSIGN(MockEnvironment);
 };
 
@@ skipping 574 matching lines @@
 
   for (size_t i = 0; i < arraysize(test_cases); i++) {
     SCOPED_TRACE(i);
     EXPECT_EQ(test_cases[i].expected_output,
               GetDirectoryFileContents(base::ASCIIToUTF16(test_cases[i].title),
                                        test_cases[i].icon_name));
   }
 }
 
 }  // namespace shell_integration_linux