replace COMPILE_ASSERT with static_assert in chrome/browser/

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

Index: chrome/browser/extensions/api/proxy/proxy_api_helpers.cc
diff --git a/chrome/browser/extensions/api/proxy/proxy_api_helpers.cc b/chrome/browser/extensions/api/proxy/proxy_api_helpers.cc
index 64a4282c836cb962f7f8869c0cfbee9651517a80..54f935767598ca20b8ee32bd63b4d8f2df4e1301 100644
--- a/chrome/browser/extensions/api/proxy/proxy_api_helpers.cc
+++ b/chrome/browser/extensions/api/proxy/proxy_api_helpers.cc
@@ -220,7 +220,7 @@ bool GetProxyRulesStringFromExtensionPref(
     }
   }
 
-  COMPILE_ASSERT(keys::SCHEME_ALL == 0, singleProxy_must_be_first_option);
+  static_assert(keys::SCHEME_ALL == 0, "SCHEME_ALL must be the first value");
 
   // Handle case that only singleProxy is specified.
   if (has_proxy[keys::SCHEME_ALL]) {
@@ -409,9 +409,10 @@ base::DictionaryValue* CreateProxyRulesDict(
       break;
   }
 
-  // If we add a new scheme some time, we need to also store a new dictionary
+  // If we add a new scheme sometime, we need to also store a new dictionary
   // representing this scheme in the code above.
-  COMPILE_ASSERT(keys::SCHEME_MAX == 4, SCHEME_FORGOTTEN);
+  static_assert(keys::SCHEME_MAX == 4,
+                "rules need to be updated along with schemes");
 
   if (proxy_config.HasBypassList()) {
     std::string bypass_list_string;