Move EnvironmentVariableGetter from base/linux_util.h to base/env_var.h and rename it EnvVarGetter. Label base::SysInfo::{Get,Has}EnvVar as deprecated.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/1606007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@43559 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 33 insertions, 0 deletions

diff --git a/base/env_var.h b/base/env_var.h
new file mode 100644
index 0000000..af1ec79
--- /dev/null
+++ b/base/env_var.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2010 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.
+
+#ifndef BASE_ENV_VAR_H_
+#define BASE_ENV_VAR_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace base {
+
+// These are used to derive mocks for unittests.
+class EnvVarGetter {
+ public:
+  virtual ~EnvVarGetter() {}
+  // Gets an environment variable's value and stores it in |result|.
+  // Returns false if the key is unset.
+  virtual bool GetEnv(const char* variable_name, std::string* result) = 0;
+
+  // Syntactic sugar for GetEnv(variable_name, NULL);
+  virtual bool HasEnv(const char* variable_name) {
+    return GetEnv(variable_name, NULL);
+  }
+
+  // Create an instance of EnvVarGetter
+  static EnvVarGetter* Create();
+};
+
+}  // namespace base
+
+#endif  // BASE_ENV_VAR_H_