Revert: Implement declarative content script API for <webview> [js part]:

https://codereview.chromium.org/718203005/

<webview> tag will not support declarative content script API anymore. Instead,
we would like to support dynamically add/remove content scripts,
which are similar to content scripts for Chrome Extension.

BUG=461052

Review URL: https://codereview.chromium.org/975133002

Cr-Commit-Position: refs/heads/master@{#318972}

chrome/browser/apps/guest_view/web_view_browsertest.cc

@@ -925,14 +925,6 @@ IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestWebRequestAPIExistence) {
   TestHelper("testWebRequestAPIExistence", "web_view/shim", NO_TEST_SERVER);
 }
 
-// Tests the existence of DeclarativeContent API event objects on the request
-// object, on the webview element, and hanging directly off webview.
-IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestDeclarativeContentAPIExistence) {
-  TestHelper("testDeclarativeContentAPIExistence",
-             "web_view/shim",
-             NO_TEST_SERVER);
-}
-
 // http://crbug.com/315920
 #if defined(GOOGLE_CHROME_BUILD) && (defined(OS_WIN) || defined(OS_LINUX))
 #define MAYBE_Shim_TestChromeExtensionURL DISABLED_Shim_TestChromeExtensionURL

chrome/renderer/resources/extensions/chrome_web_view_experimental.js

@@ -19,23 +19,6 @@ var idGeneratorNatives = requireNative('id_generator');
 var MessagingNatives = requireNative('messaging_natives');
 var utils = require('utils');
 var WebViewImpl = require('webView').WebViewImpl;
-var DeclarativeContentSchema =
-    requireNative('schema_registry').GetSchema('declarativeContent');
-
-var DeclarativeContentEvent = function(opt_eventName,
-                                       opt_argSchemas,
-                                       opt_eventOptions,
-                                       opt_webViewInstanceId) {
-  EventBindings.Event.call(this,
-                           opt_eventName,
-                           opt_argSchemas,
-                           opt_eventOptions,
-                           opt_webViewInstanceId);
-}
-
-DeclarativeContentEvent.prototype = {
-  __proto__: EventBindings.Event.prototype
-};
 
 function GetUniqueSubEventName(eventName) {
   return eventName + '/' + idGeneratorNatives.GetNextId();
@@ -192,35 +175,3 @@ WebViewImpl.prototype.setupExperimentalContextMenus = function() {
         enumerable: true
       });
 };
-
-WebViewImpl.prototype.maybeSetupExperimentalChromeWebViewEvents = function(
-    request) {
-  var createDeclarativeContentEvent = function(declarativeContentEvent) {
-    return function() {
-      if (!this[declarativeContentEvent.name]) {
-        this[declarativeContentEvent.name] =
-            new DeclarativeContentEvent(
-                'webViewInternal.declarativeContent.' +
-                declarativeContentEvent.name,
-                declarativeContentEvent.parameters,
-                declarativeContentEvent.options,
-                this.viewInstanceId);
-      }
-      return this[declarativeContentEvent.name];
-    }.bind(this);
-  }.bind(this);
-
-  for (var i = 0; i < DeclarativeContentSchema.events.length; ++i) {
-    var eventSchema = DeclarativeContentSchema.events[i];
-    var declarativeContentEvent = createDeclarativeContentEvent(eventSchema);
-    Object.defineProperty(
-        request,
-        eventSchema.name,
-        {
-          get: declarativeContentEvent,
-          enumerable: true
-        }
-    );
-  }
-  return request;
-};

chrome/test/data/extensions/platform_apps/web_view/shim/main.js

@@ -549,38 +549,6 @@ function testWebRequestAPIExistence() {
   document.body.appendChild(webview);
 }
 
-function testDeclarativeContentAPIExistence() {
-  var apiPropertiesToCheck = [
-    // Declarative Content API.
-    'onPageChanged'
-  ];
-  var webview = document.createElement('webview');
-  webview.setAttribute('partition', arguments.callee.name);
-  webview.addEventListener('loadstop', function(e) {
-    for (var i = 0; i < apiPropertiesToCheck.length; ++i) {
-      embedder.test.assertEq('object',
-                             typeof webview.request[apiPropertiesToCheck[i]]);
-      embedder.test.assertEq(
-          'function',
-          typeof webview.request[apiPropertiesToCheck[i]].addRules);
-      embedder.test.assertEq(
-          'function',
-          typeof webview.request[apiPropertiesToCheck[i]].getRules);
-      embedder.test.assertEq(
-          'function',
-          typeof webview.request[apiPropertiesToCheck[i]].removeRules);
-    }
-
-    // Try to overwrite webview.request, shall not succeed.
-    webview.request = '123';
-    embedder.test.assertTrue(typeof webview.request !== 'string');
-
-    embedder.test.succeed();
-  });
-  webview.setAttribute('src', 'data:text/html,webview check api');
-  document.body.appendChild(webview);
-}
-
 // This test verifies that the loadstart, loadstop, and exit events fire as
 // expected.
 function testEventName() {
@@ -2080,7 +2048,6 @@ embedder.test.testList = {
       testInlineScriptFromAccessibleResources,
   'testInvalidChromeExtensionURL': testInvalidChromeExtensionURL,
   'testWebRequestAPIExistence': testWebRequestAPIExistence,
-  'testDeclarativeContentAPIExistence': testDeclarativeContentAPIExistence,
   'testEventName': testEventName,
   'testOnEventProperties': testOnEventProperties,
   'testLoadProgressEvent': testLoadProgressEvent,

extensions/renderer/resources/guest_view/web_view.js

@@ -231,10 +231,6 @@ WebViewImpl.prototype.maybeGetChromeWebViewEvents = function() {};
 // Implemented when the experimental WebView API is available.
 WebViewImpl.maybeGetExperimentalApiMethods = function() { return []; };
 WebViewImpl.prototype.setupExperimentalContextMenus = function() {};
-WebViewImpl.prototype.maybeSetupExperimentalChromeWebViewEvents =
-  function(request) {
-    return request;
-};
 
 GuestViewContainer.registerElement(WebViewImpl);
 

extensions/renderer/resources/guest_view/web_view_events.js

@@ -266,7 +266,6 @@ WebViewEvents.prototype.setupWebRequestEvents = function() {
     );
   }
 
-  request = this.webViewImpl.maybeSetupExperimentalChromeWebViewEvents(request);
   this.webViewImpl.setRequestPropertyOnWebViewElement(request);
 };