Make <webview> use out-of-process iframe architecture.

extensions/renderer/resources/guest_view/web_view/web_view.js

Index: extensions/renderer/resources/guest_view/web_view/web_view.js
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view.js b/extensions/renderer/resources/guest_view/web_view/web_view.js
index c58a441edb0aaf175a09c0bcf44aa558b4215f11..1d92fc2c653610ee2d0aff315bed40ebc46759e5 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view.js
@@ -14,6 +14,11 @@ var WebViewConstants = require('webViewConstants').WebViewConstants;
 var WebViewEvents = require('webViewEvents').WebViewEvents;
 var WebViewInternal = require('webViewInternal').WebViewInternal;
 
+var IdGenerator = requireNative('id_generator');
+var GuestViewInternalNatives = requireNative('guest_view_internal');
+
+var LOG = function(msg) { window.console.log(msg); };
+
 // Represents the internal state of <webview>.
 function WebViewImpl(webviewElement) {
   GuestViewContainer.call(this, webviewElement, 'webview');
@@ -59,6 +64,7 @@ WebViewImpl.prototype.onElementAttached = function() {
   for (var i in this.attributes) {
     this.attributes[i].dirty = true;
   }
+  // FIXME: Not sure about this one.
   for (var i in this.attributes) {
     this.attributes[i].attach();
   }
@@ -188,9 +194,47 @@ WebViewImpl.prototype.attachWindow = function(opt_guestInstanceId) {
     this.guest = new GuestView('webview', opt_guestInstanceId);
   }
 
+  if (GuestViewInternalNatives.IsSitePerProcess()) {
+    return this.attachForSitePerProcess();
+  }
+
+  if (!this.internalInstanceId) {
+    return true;
+  }
+
   return GuestViewContainer.prototype.attachWindow.call(this);
 };
 
+WebViewImpl.prototype.attachForSitePerProcess = function() {
+  LOG('Guest will start attach');
+  var generatedId = IdGenerator.GetNextId();
+  this.internalInstanceId = generatedId;
+
+  LOG('this.guest.getId() = ' + this.guest.getId());
+  window.console.log(this.getBrowserPluginElement());
+  var ret = GuestViewInternalNatives.AttachIframeGuest(
+      this.internalInstanceId, this.guest.getId(),
+      this.getBrowserPluginElement().contentWindow, function() {
+        // TODO(lazyboy): Once http://crbug.com/480676 is fixed, we won't need
+        // to set contentWindow in callback, we can use <webview>.contentWindow
+        // to point to <iframe>.contentWindow right after creation.
+        var frameContentWindow = this.getBrowserPluginElement().contentWindow;
+        this.guest.setContentWindow(frameContentWindow);
+      }.bind(this));
+
+  LOG('guestViewInternalNatives.AttachIframeGuest status: ' + ret);
+
+  window.setTimeout(function() {
+    LOG('<webview>: navigate');
+    var src =
+        this.attributes[WebViewConstants.ATTRIBUTE_SRC].getValue();
+    WebViewInternal.navigate(
+        this.guest.getId(), src);
+  }.bind(this), 0);
+
+  return true;
+};
+
 // Shared implementation of executeScript() and insertCSS().
 WebViewImpl.prototype.executeCode = function(func, args) {
   if (!this.guest.getId()) {