Send extension console messages to the right WebFrame.

chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js

+function createTestFunction(expected_message) {
+  return function(tab) {
+    chrome.debugger.onEvent.addListener(function(debuggee, method, params) {

[not at google - send to devlin, 2014/11/11 00:50:25]

Also nice to remove the event listener when the test is over.

[msimonides, 2014/11/12 07:41:01]

Done.

+      if (debuggee.tabId == tab.id && method == 'Console.messageAdded') {
+        if (params.message.text.indexOf(expected_message) > -1)
+          chrome.test.succeed();
+      }
+    });
+    chrome.debugger.attach({ tabId: tab.id }, "1.1", function() {
+      chrome.tabs.sendMessage(tab.id, { "action": "start_test" });

[not at google - send to devlin, 2014/11/11 00:50:25]

Should this sendMessage only happen if the chrome.debugger.sendCommand function
succeeded? Seems a little bit racy otherwise?

[msimonides, 2014/11/12 07:41:01]

There is no race between sendMessage and debugger.sendCommand. Enabling the
console automatically sends all the past messages.
Actually I will remove the sendMessage and the other pages can just throw their
exceptions right away - this will be more straightforward.

+      // Enabling console provides both stored and new messages via the
+      // Console.messageAdded event.
+      chrome.debugger.sendCommand({ tabId: tab.id }, "Console.enable");
+    });
+  }
+}
+
+chrome.test.runTests([
+  function ExceptionInExtensionPage() {

[not at google - send to devlin, 2014/11/11 00:50:25]

More consistent if these are testExceptionInExtensionPage() ... etc (i.e. start
with "test"). 

(Besides which JS function names are supposed to start with a lower case
letter.)

[msimonides, 2014/11/12 07:41:01]

Done.

+    chrome.tabs.create(
+        {url: chrome.runtime.getURL("extension_page.html")},

[not at google - send to devlin, 2014/11/11 00:50:25]

Be consistent with " vs ' (I prefer ').

[msimonides, 2014/11/12 07:41:01]

Done.

+        createTestFunction('Exception thrown in extension page.'));
+  },
+
+  function ExceptionInInjectedScript() {
+    function injectScriptAndSendMessage(tab) {
+      chrome.tabs.executeScript(
+          tab.id,
+          { file: "content_script.js" },
+          function() {
+            (createTestFunction('Exception thrown in injected script.'))(tab);

[not at google - send to devlin, 2014/11/11 00:50:25]

I don't think you need the outer parens here.

[msimonides, 2014/11/12 07:41:01]

Done.

+          });
+    }
+
+    chrome.test.log('getConfig');

[not at google - send to devlin, 2014/11/11 00:50:25]

No logging.

[msimonides, 2014/11/12 07:41:01]

Done.

+    chrome.test.getConfig(function(config) {
+      var test_url =
+          "http://localhost:PORT/extensions/test_file.html"
+              .replace(/PORT/, config.testServer.port);
+
+      chrome.tabs.create({ url: test_url }, injectScriptAndSendMessage);
+    });
+  }
+]);