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 fd0e45c81b01e04239d6704d51194cc3d1cfff2d..8ec437d43206a24494c4e32e487ccefbd9832813 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view.js
@@ -14,11 +14,17 @@ 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');
   this.cachedZoom = 1;
   this.setupElementProperties();
+  this.isSitePerProcess = GuestViewInternalNatives.IsSitePerProcess();
   new WebViewEvents(this, this.viewInstanceId);
 }
 
@@ -59,6 +65,7 @@ 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();
   }
@@ -92,7 +99,11 @@ WebViewImpl.prototype.setupElementProperties = function() {
   // dynamic getter value.
   Object.defineProperty(this.element, 'contentWindow', {
     get: function() {
-      return this.guest.getContentWindow();
+      if (this.isSitePerProcess) {
+        return this.getBrowserPluginElement().contentWindow;
+      } else {
+        return this.guest.getContentWindow();
+      }
     }.bind(this),
     // No setter.
     enumerable: true
@@ -189,9 +200,43 @@ WebViewImpl.prototype.attachWindow = function(opt_guestInstanceId) {
     this.guest = new GuestView('webview', opt_guestInstanceId);
   }
 
+  if (this.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() {
+        // No need to set contentWindow, we will use <iframe>.contentWindow.
+      }.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()) {