Cleanup: Better constify some strings in chrome.

chrome/test/chromedriver/window_commands.cc

Index: chrome/test/chromedriver/window_commands.cc
diff --git a/chrome/test/chromedriver/window_commands.cc b/chrome/test/chromedriver/window_commands.cc
index aa07400849a81f6fdd8a2e875d557e0794bb422f..930456ee9fd097836428ffb39aba20dd394e6537 100644
--- a/chrome/test/chromedriver/window_commands.cc
+++ b/chrome/test/chromedriver/window_commands.cc
@@ -343,7 +343,7 @@ Status ExecuteSwitchToFrame(
     return Status(kUnknownError, "fail to locate the sub frame element");
 
   std::string chrome_driver_id = GenerateId();
-  const char* kSetFrameIdentifier =
+  const char kSetFrameIdentifier[] =
       "function(frame, id) {"
       "  frame.setAttribute('cd_frame_id_', id);"
       "}";
@@ -373,7 +373,7 @@ Status ExecuteGetTitle(
     WebView* web_view,
     const base::DictionaryValue& params,
     scoped_ptr<base::Value>* value) {
-  const char* kGetTitleScript =
+  const char kGetTitleScript[] =
       "function() {"
       "  if (document.title)"
       "    return document.title;"
@@ -389,7 +389,7 @@ Status ExecuteGetPageSource(
     WebView* web_view,
     const base::DictionaryValue& params,
     scoped_ptr<base::Value>* value) {
-  const char* kGetPageSource =
+  const char kGetPageSource[] =
       "function() {"
       "  return new XMLSerializer().serializeToString(document);"
       "}";