base: Rename EnvVarGetter to Environment.

Now EnvVarGetter do much more than getting environment variables.

Per suggestion from Pawel in http://codereview.chromium.org/3043018/.

BUG=None
TEST=trybots

Signed-off-by: Thiago Farina <tfarina@chromium.org>

Review URL: http://codereview.chromium.org/3052034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@54696 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 48 insertions, 0 deletions

diff --git a/base/environment.h b/base/environment.h
new file mode 100644
index 0000000..a586ae8
--- /dev/null
+++ b/base/environment.h
@@ -0,0 +1,48 @@
+// 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_ENVIRONMENT_H_
+#define BASE_ENVIRONMENT_H_
+#pragma once
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace base {
+
+namespace env_vars {
+
+#if defined(OS_POSIX)
+extern const char kHome[];
+#endif
+
+}  // namespace env_vars
+
+class Environment {
+ public:
+  virtual ~Environment();
+
+  // Static factory method that returns the implementation that provide the
+  // appropriate platform-specific instance.
+  static Environment* Create();
+
+  // 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);
+
+  // Returns true on success, otherwise returns false.
+  virtual bool SetEnv(const char* variable_name,
+                      const std::string& new_value) = 0;
+
+  // Returns true on success, otherwise returns false.
+  virtual bool UnSetEnv(const char* variable_name) = 0;
+};
+
+}  // namespace base
+
+#endif  // BASE_ENVIRONMENT_H_