Implement experimental.contentSettings.misc.blockThirdPartyCookies.

chrome/test/data/extensions/api_test/stubs/content_script.js

 
 // Helper function to log message to both the local console and to the
 // background page, so that the latter can output the message via the
 // chrome.test.log() function.
 function logToConsoleAndStdout(msg) {
   console.log(msg);
   chrome.extension.sendRequest("log: " + msg);
 }
 
 // We ask the background page to get the extension API to test against. When it
@@ skipping 48 matching lines @@
   // Iterate over each component of the path, making sure all but the last part
   // is defined. The last part should either be defined or throw an error on
   // attempted access.
   var module = chrome;
   for (var i = 0; i < parts.length; i++) {
     if (i < parts.length - 1) {
       // Not the last component, so expect non-null / no exception.
       try {
         module = module[parts[i]];
       } catch (err) {
-        logToConsoleAndStdout("testPath failed on subcomponent of " + path);
+        logToConsoleAndStdout("testPath failed on " +
+                              parts.slice(0, i+1).join('.') + '(' + err + ')');
         return false;
       }
     } else {
       // This is the last component - we expect it to either be defined or
       // to throw an error on access.
       try {
         if (typeof(module[parts[i]]) == "undefined" &&
             path != "extension.lastError") {
           logToConsoleAndStdout(" fail (undefined and not throwing error): " +
                                 path);
@@ skipping 72 matching lines @@
   if (success) {
     reportSuccess();
   } else {
     logToConsoleAndStdout("failures on:\n" + failures.join("\n") +
         "\n\n\n>>> See comment in stubs_apitest.cc for a " +
         "hint about fixing this failure.\n\n");
     reportFailure();
   }
 }