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

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 1190 matching lines @@
               params.main_frame_routing_id == MSG_ROUTING_NONE) ||
          (params.routing_id != MSG_ROUTING_NONE &&
               params.main_frame_routing_id != MSG_ROUTING_NONE));
   GetRenderManager()->Init(
       params.browser_context, params.site_instance, params.routing_id,
       params.main_frame_routing_id);
 
   WebContentsViewDelegate* delegate =
       GetContentClient()->browser()->GetWebContentsViewDelegate(this);
 
-  if (browser_plugin_guest_) {
-    scoped_ptr<WebContentsView> platform_view(CreateWebContentsView(
-        this, delegate, &render_view_host_delegate_view_));
-
-    WebContentsViewGuest* rv = new WebContentsViewGuest(
-        this, browser_plugin_guest_.get(), platform_view.Pass(),
-        render_view_host_delegate_view_);
-    render_view_host_delegate_view_ = rv;
-    view_.reset(rv);
-  } else {
+//  if (browser_plugin_guest_) {
+//    scoped_ptr<WebContentsView> platform_view(CreateWebContentsView(
+//        this, delegate, &render_view_host_delegate_view_));
+//
+//    WebContentsViewGuest* rv = new WebContentsViewGuest(
+//        this, browser_plugin_guest_.get(), platform_view.Pass(),
+//        render_view_host_delegate_view_);
+//    render_view_host_delegate_view_ = rv;
+//    view_.reset(rv);
+//  } else {
     // Regular WebContentsView.
     view_.reset(CreateWebContentsView(
         this, delegate, &render_view_host_delegate_view_));
-  }
+//  }
   CHECK(render_view_host_delegate_view_);
   CHECK(view_.get());
 
   gfx::Size initial_size = params.initial_size;
   view_->CreateView(initial_size, params.context);
 
   // Listen for whether our opener gets destroyed.
   if (opener_)
     AddDestructionObserver(opener_);
 
@@ skipping 32 matching lines @@
   }
 
   // Ensure that observers are notified of the creation of this WebContents's
   // main RenderFrameHost. It must be done here for main frames, since the
   // NotifySwappedFromRenderManager expects view_ to already be created and that
   // happens after RenderFrameHostManager::Init.
   NotifySwappedFromRenderManager(
       nullptr, GetRenderManager()->current_frame_host(), true);
 }
 
+int WebContentsImpl::AttachLocalFrameToGuest(WebContents* embedder_web_contents,
+                                             int embedder_frame_routing_id) {
+  // 1. Create a link to our parent WebContents.
+  node_.set_parent_web_contents(
+      static_cast<WebContentsImpl*>(embedder_web_contents));
+
+  // 2. Create a swapped out RVH and a proxy in our render manager, pointing
+  // to embedder site instance. The swapped out RVH will be used to send
+  // postMessage to guest.
+  int swapped_out_render_view_routing_id = MSG_ROUTING_NONE;
+  int proxy_to_embedder_routing_id = GetRenderManager()->CreateEmbedderProxy(
+      embedder_web_contents->GetSiteInstance(),

[Charlie Reis, 2015/04/08 23:42:11]

What if the embedder WebContents has the <webview> tag in an OOPIF?  We should
call GetSiteInstance on the RenderFrameHost that has the tag, not on the
WebContents itself (which corresponds to the main frame).

[lazyboy, 2015/04/14 01:38:03]

Done.

+      &swapped_out_render_view_routing_id);
+
+  // 3. Swap the embedder's initial frame pointing to guest with the proxy
+  // we've created above.
+  // The proxy has a CPFC and it uses the swapped out RV as its RenderWidget,
+  // which gives us input and rendering.
+  RenderFrameHostImpl* embedder_frame =
+      RenderFrameHostImpl::FromID(
+          embedder_web_contents->GetRenderProcessHost()->GetID(),

[Charlie Reis, 2015/04/08 23:42:11]

Same.  We have to pass in the process ID, because not all frames in the embedder
are in the same process.

[lazyboy, 2015/04/14 01:38:04]

Done.

+          embedder_frame_routing_id);
+  DCHECK(embedder_frame);
+  embedder_frame->frame_tree_node()->render_manager()
+      ->ReplaceWithGuestProxy(proxy_to_embedder_routing_id);
+
+  // The swapped out render view routing ID will be used to send
+  // postMessage.
+  return swapped_out_render_view_routing_id;
+}
+
 void WebContentsImpl::OnWebContentsDestroyed(WebContentsImpl* web_contents) {
   RemoveDestructionObserver(web_contents);
 
   // Clear the opener if it has been closed.
   if (web_contents == opener_) {
     opener_ = NULL;
     return;
   }
   // Clear a pending contents that has been closed before being shown.
   for (PendingContents::iterator iter = pending_contents_.begin();
@@ skipping 237 matching lines @@
   if (delegate_)
     delegate_->LostMouseLock();
 }
 
 void WebContentsImpl::CreateNewWindow(
     int render_process_id,
     int route_id,
     int main_frame_route_id,
     const ViewHostMsg_CreateWindow_Params& params,
     SessionStorageNamespace* session_storage_namespace) {
+  // TODO(lazyboy): CreateNewWindow doesn't work for <webview> yet.
+  DCHECK(0);
   // We usually create the new window in the same BrowsingInstance (group of
   // script-related windows), by passing in the current SiteInstance.  However,
   // if the opener is being suppressed (in a non-guest), we create a new
   // SiteInstance in its own BrowsingInstance.
   bool is_guest = BrowserPluginGuest::IsGuest(this);
 
   // If the opener is to be suppressed, the new window can be in any process.
   // Since routing ids are process specific, we must not have one passed in
   // as argument here.
   DCHECK(!params.opener_suppressed || route_id == MSG_ROUTING_NONE);
@@ skipping 200 matching lines @@
 
 void WebContentsImpl::ShowCreatedWidget(int route_id,
                                         bool is_fullscreen,
                                         const gfx::Rect& initial_rect) {
   RenderWidgetHostViewBase* widget_host_view =
       static_cast<RenderWidgetHostViewBase*>(GetCreatedWidget(route_id));
   if (!widget_host_view)
     return;
 
   RenderWidgetHostView* view = NULL;
-  BrowserPluginGuest* guest = GetBrowserPluginGuest();
-  if (guest && guest->embedder_web_contents()) {
-    view = guest->embedder_web_contents()->GetRenderWidgetHostView();
-  } else {
+//  BrowserPluginGuest* guest = GetBrowserPluginGuest();
+//  if (guest && guest->embedder_web_contents()) {
+//    view = guest->embedder_web_contents()->GetRenderWidgetHostView();
+//  } else {
     view = GetRenderWidgetHostView();
-  }
+//  }
 
   if (is_fullscreen) {
     DCHECK_EQ(MSG_ROUTING_NONE, fullscreen_widget_routing_id_);
     view_->StoreFocus();
     fullscreen_widget_routing_id_ = route_id;
     if (delegate_ && delegate_->EmbedsFullscreenWidget()) {
       widget_host_view->InitAsChild(GetRenderWidgetHostView()->GetNativeView());
       delegate_->EnterFullscreenModeForTab(this, GURL());
     } else {
       widget_host_view->InitAsFullscreen(view);
@@ skipping 2554 matching lines @@
     int proxy_routing_id,
     bool for_main_frame_navigation) {
   TRACE_EVENT0("browser,navigation",
                "WebContentsImpl::CreateRenderViewForRenderManager");
   // Can be NULL during tests.
   RenderWidgetHostViewBase* rwh_view;
   // TODO(kenrb): RenderWidgetHostViewChildFrame special casing is temporary
   // until RenderWidgetHost is attached to RenderFrameHost. We need to special
   // case this because RWH is still a base class of RenderViewHost, and child
   // frame RWHVs are unique in that they do not have their own WebContents.
-  if (!for_main_frame_navigation) {
+  bool is_guest = !!browser_plugin_guest_.get();
+  if (!for_main_frame_navigation || is_guest) {
     RenderWidgetHostViewChildFrame* rwh_view_child =
         new RenderWidgetHostViewChildFrame(render_view_host);
     rwh_view = rwh_view_child;
   } else {
     rwh_view = view_->CreateViewForWidget(render_view_host, false);
   }
 
   // Now that the RenderView has been created, we need to tell it its size.
   if (rwh_view)
     rwh_view->SetSize(GetSizeForNewRenderView());
@@ skipping 121 matching lines @@
   last_reported_encoding_ = encoding;
 
   canonical_encoding_ = GetContentClient()->browser()->
       GetCanonicalEncodingNameByAliasName(encoding);
 }
 
 bool WebContentsImpl::IsHidden() {
   return capturer_count_ == 0 && !should_normally_be_visible_;
 }
 
+int64 WebContentsImpl::GetParentFrameTreeNodeID() {
+  if (node_.parent_web_contents()) {
+    return node_.parent_web_contents()->GetFrameTree()->root()
+        ->frame_tree_node_id();
+  }
+  return -1;
+}
+
 RenderFrameHostManager* WebContentsImpl::GetRenderManager() const {
   return frame_tree_.root()->render_manager();
 }
 
 RenderViewHostImpl* WebContentsImpl::GetRenderViewHostImpl() {
   return static_cast<RenderViewHostImpl*>(GetRenderViewHost());
 }
 
 BrowserPluginGuest* WebContentsImpl::GetBrowserPluginGuest() const {
   return browser_plugin_guest_.get();
 }
 
 void WebContentsImpl::SetBrowserPluginGuest(BrowserPluginGuest* guest) {
   CHECK(!browser_plugin_guest_);
+  CHECK(guest);
   browser_plugin_guest_.reset(guest);
 }
 
 BrowserPluginEmbedder* WebContentsImpl::GetBrowserPluginEmbedder() const {
   return browser_plugin_embedder_.get();
 }
 
 void WebContentsImpl::CreateBrowserPluginEmbedderIfNecessary() {
   if (browser_plugin_embedder_)
     return;
@@ skipping 86 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content