Make executeScript and insertCSS inject code into all frames....

chrome/test/data/extensions/api_test/executescript_in_frame/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_in_frame/test_executescript.html';
+var testUrl = 'http://a.com:1337' + relativePath;
+
+chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
+  if (changeInfo.status != 'complete')
+    return;
+
+  chrome.test.runTests([
+    function executeJavaScriptCodeInAllFramesShouldSucceed() {
+      var script_file = {};
+      script_file.code = "var extensionPort = chrome.extension.connect();";
+      script_file.code = script_file.code +
+          "extensionPort.postMessage({message: document.title});";
+      script_file.allFrames = true;
+      var counter = 0;
+      var totalTitles = '';
+      function eventListener(port) {
+        port.onMessage.addListener(function(data) {
+          counter++;
+          totalTitles += data.message;
+        });
+      };
+      chrome.self.onConnect.addListener(eventListener);
+      chrome.tabs.executeScript(tabId, script_file, pass(function() {
+        assertEq(counter, 5);
+        assertEq(totalTitles, 'frametest0test1test2test3');
+        chrome.self.onConnect.removeListener(eventListener);
+      }));
+    },
+
+    function insertCSSTextInAllFramesShouldSucceed() {
+      var css_file = {};
+      css_file.code = "p {display:none;}";
+      css_file.allFrames = true;
+      var newStyle = '';
+      var counter = 0;
+      function eventListener(port) {
+        port.onMessage.addListener(function(data) {
+          counter++;
+          newStyle += data.message;
+        });
+      };
+      chrome.self.onConnect.addListener(eventListener);
+      chrome.tabs.insertCSS(tabId, css_file, function() {
+        var script_file = {};
+        script_file.file = 'script.js';
+        script_file.allFrames = true;
+        chrome.tabs.executeScript(tabId, script_file,
+          pass(function() {
+            assertEq(newStyle, 'nonenonenonenone');
+            assertEq(counter, 4);
+            chrome.self.onConnect.removeListener(eventListener);
+        }));
+      });
+    }
+  ]);
+});
+
+chrome.tabs.create({ url: testUrl });
+
+</script>