Correct const accessors in base/values.(h|cc)

chrome/test/webdriver/commands/window_commands.cc

Index: chrome/test/webdriver/commands/window_commands.cc
diff --git a/chrome/test/webdriver/commands/window_commands.cc b/chrome/test/webdriver/commands/window_commands.cc
index f67500b395d9022cd692858e0c5bbe9ebcaff171..b0cdc0995d5945fc812d2fcfdfd61d6788fcb1d1 100644
--- a/chrome/test/webdriver/commands/window_commands.cc
+++ b/chrome/test/webdriver/commands/window_commands.cc
@@ -34,7 +34,7 @@ bool GetWindowId(const std::string& window_id_string,
 
 WindowSizeCommand::WindowSizeCommand(
     const std::vector<std::string>& path_segments,
-    const base::DictionaryValue* parameters)
+    base::DictionaryValue* parameters)
     : WebDriverCommand(path_segments, parameters) {
 }
 
@@ -97,7 +97,7 @@ void WindowSizeCommand::ExecutePost(Response* const response) {
 
 WindowPositionCommand::WindowPositionCommand(
     const std::vector<std::string>& path_segments,
-    const base::DictionaryValue* parameters)
+    base::DictionaryValue* parameters)
     : WebDriverCommand(path_segments, parameters) {
 }
 
@@ -160,7 +160,7 @@ void WindowPositionCommand::ExecutePost(Response* const response) {
 
 WindowMaximizeCommand::WindowMaximizeCommand(
     const std::vector<std::string>& path_segments,
-    const base::DictionaryValue* parameters)
+    base::DictionaryValue* parameters)
     : WebDriverCommand(path_segments, parameters) {
 }