[Extensions Bindings] Add native declarativeContent verification

chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js

Index: chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js
diff --git a/chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js b/chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js
index b2fa91496778abb74017ab066e839007cd6c9317..dead4fbcfb9665db0753bb4a5d70d3e37aaf636e 100644
--- a/chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js
+++ b/chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js
@@ -8,16 +8,23 @@
 
 const kRuleId = 'rule1';
 
+var canvas = document.createElement('canvas');
+var ctx = canvas.getContext('2d');
+var imageData = ctx.createImageData(19, 19);

[jbroman, 2017/05/01 20:16:40]

nit: Why not just "new ImageData(19, 19)"?

[Devlin, 2017/05/01 20:46:47]

copy-paste code.  Simplified.

+
 var rule = {
   conditions: [
     new chrome.declarativeContent.PageStateMatcher(
         {pageUrl: {hostPrefix: 'example'}}),
   ], actions: [
     new chrome.declarativeContent.ShowPageAction(),
+    new chrome.declarativeContent.SetIcon({imageData: imageData}),
   ],
   id: kRuleId,
 };
 
+console.warn(JSON.stringify(rule));

[jbroman, 2017/05/01 20:16:40]

Was this left here from debugging?

[Devlin, 2017/05/01 20:46:47]

Whoops, thought I caught them all.  Removed.

+
 chrome.pageAction.onClicked.addListener(function() {
   chrome.declarativeContent.onPageChanged.removeRules([kRuleId], function() {
     chrome.declarativeContent.onPageChanged.getRules(function(rules) {
@@ -34,3 +41,24 @@ chrome.declarativeContent.onPageChanged.addRules([rule], function() {
     chrome.test.sendMessage('ready');
   });
 });
+
+function didThrow(func) {
+  var caught = false;
+  try {
+    func();
+  } catch (e) {
+    caught = true;
+  }
+  return caught;
+}
+
+chrome.test.runTests([
+  function validationCheck() {
+    // Test that type constructions are properly validated.
+    chrome.test.assertTrue(didThrow(function() {
+      var matcher = new chrome.declarativeContent.PageStateMatcher(
+          {pageUrl: {fake: 'bogus'}});
+    }));
+    chrome.test.succeed();
+  },
+]);