Cleanup: Better constify some strings in chrome/browser/{chromeos,extensions}.

chrome/browser/extensions/api/proxy/proxy_api_constants.cc

Index: chrome/browser/extensions/api/proxy/proxy_api_constants.cc
diff --git a/chrome/browser/extensions/api/proxy/proxy_api_constants.cc b/chrome/browser/extensions/api/proxy/proxy_api_constants.cc
index df2c8bb00b9648602ec7ce6d059d1f73a7ff90ad..3142b2f75894135d58fa95c8b31c228fa0b91c16 100644
--- a/chrome/browser/extensions/api/proxy/proxy_api_constants.cc
+++ b/chrome/browser/extensions/api/proxy/proxy_api_constants.cc
@@ -30,17 +30,17 @@ const char kProxyEventOnProxyError[] = "proxy.onProxyError";
 const char kPACDataUrlPrefix[] =
     "data:application/x-ns-proxy-autoconfig;base64,";
 
-const char* field_name[] = { "singleProxy",
-                             "proxyForHttp",
-                             "proxyForHttps",
-                             "proxyForFtp",
-                             "fallbackProxy" };
-
-const char* scheme_name[] = { "*error*",
-                              "http",
-                              "https",
-                              "ftp",
-                              "socks" };
+const char* const field_name[] = { "singleProxy",
+                                   "proxyForHttp",
+                                   "proxyForHttps",
+                                   "proxyForFtp",
+                                   "fallbackProxy" };
+
+const char* const scheme_name[] = { "*error*",
+                                    "http",
+                                    "https",
+                                    "ftp",
+                                    "socks" };
 
 COMPILE_ASSERT(SCHEME_MAX == SCHEME_FALLBACK,
                SCHEME_MAX_must_equal_SCHEME_FALLBACK);
@@ -51,4 +51,4 @@ COMPILE_ASSERT(arraysize(scheme_name) == SCHEME_MAX + 1,
 COMPILE_ASSERT(SCHEME_ALL == 0, singleProxy_must_be_first_option);
 
 }  // namespace proxy_api_constants
-}  // extensions
+}  // namespace extensions