Make executeScript and insertCSS inject code into all frames.

chrome/test/data/extensions/api_test/executescript/test.html

 <script>
 
 var pass = chrome.test.callbackPass;
 var fail = chrome.test.callbackFail;
 var assertEq = chrome.test.assertEq;
 var assertTrue = chrome.test.assertTrue;
 var relativePath =
     '/files/extensions/api_test/executescript/test_executescript.html';
 var testUrl = 'http://a.com:1337' + relativePath;
 var testFailureUrl = 'http://b.com:1337' + relativePath;
-var testingFailure = false;
+var firstEnter = true;
 
 chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
-  if (changeInfo.status == 'complete')
+  if (changeInfo.status != 'complete')
     return;
-  if (testingFailure) {
+  if (!firstEnter) {
     return;
   }
+  firstEnter = false;
 
   chrome.test.runTests([
 
     function executeJavaScriptCodeShouldSucceed() {
       var script_file = {};
       script_file.code = "document.title = 'executeScript';";
       chrome.tabs.executeScript(tabId, script_file, function() {
         chrome.tabs.get(tabId, pass(function(tab) {
           assertEq(tab.title, 'executeScript');
         }));
@@ skipping 32 matching lines @@
         script_file.file = 'script2.js';
         chrome.tabs.executeScript(tabId, script_file, function() {
           chrome.tabs.get(tabId, pass(function(tab) {
             assertEq(tab.title, 'block');
           }));
         });
       });
     },
 
     function executeJavaScriptCodeShouldFail() {
-      testingFailure = true;
       chrome.tabs.update(tabId, { url: testFailureUrl }, function() {
         var script_file = {};
         script_file.code = "document.title = 'executeScript';";
         chrome.tabs.executeScript(tabId, script_file, fail(
             'Cannot access contents of url "' + testFailureUrl +
             '". Extension manifest must request permission to access this ' +
             'host.'));
       });
+    },
+
+    function executeJavaScriptWithNoneValueShouldFail() {
+      var script_file = {};
+      chrome.tabs.executeScript(tabId, script_file, fail(
+          'No source code or file specified.'));
+    },
+
+    function executeJavaScriptWithTwoValuesShouldFail() {
+      var script_file = {};
+      script_file.file = 'script1.js';
+      script_file.code = 'var test = 1;';
+      chrome.tabs.executeScript(tabId, script_file, fail(
+          'Code and file should not be specified ' +
+          'at the same time in the second argument'));
     }
   ]);
 });
 
 chrome.tabs.create({ url: testUrl });
 
 </script>