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

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 43d74a22a2d2cfecd0401377b47c8d696772446e..07053b0a0990870600d6bccfc3cbf4153f129d16 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -286,6 +286,17 @@ WebContentsImpl::ColorChooserInfo::ColorChooserInfo(int render_process_id,
 WebContentsImpl::ColorChooserInfo::~ColorChooserInfo() {
 }
 
+// WebContentsImpl::WebContentsTreeNode ----------------------------------------
+WebContentsImpl::WebContentsTreeNode::WebContentsTreeNode()
+    : parent_web_contents_(nullptr) {
+}
+
+WebContentsImpl::WebContentsTreeNode::~WebContentsTreeNode() {
+  // TODO(lazyboy): Enforce that a child WebContentsTreeNode gets deleted
+  // before its parent.  Otherwise the child could have a stale pointer to its
+  // parent WebContents, risking a use-after-free.

[Charlie Reis, 2015/05/22 23:44:31]

This must be fixed before committing.

+}
+
 // WebContentsImpl -------------------------------------------------------------
 
 WebContentsImpl::WebContentsImpl(BrowserContext* browser_context,
@@ -1132,6 +1143,37 @@ void WebContentsImpl::DispatchBeforeUnload(bool for_cross_site_transition) {
   GetMainFrame()->DispatchBeforeUnload(for_cross_site_transition);
 }
 
+void WebContentsImpl::AttachToOuterWebContentsFrame(
+    WebContents* outer_web_contents,
+    RenderFrameHost* outer_contents_frame) {
+  CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kSitePerProcess));
+  // Create a link to our parent WebContents.

[Charlie Reis, 2015/05/22 23:44:31]

outer

[lazyboy, 2015/05/26 16:32:55]

Done.

+  node_.set_parent_web_contents(
+      static_cast<WebContentsImpl*>(outer_web_contents));
+
+  DCHECK(outer_contents_frame);
+
+  // Create a swapped out RVH and a proxy in our render manager, pointing
+  // to the SiteInstance of the outer WebContents. The swapped out RVH will be
+  // used to send postMessage to the inner WebContents.
+  int proxy_to_outer_web_contents_routing_id =
+      GetRenderManager()->CreateOuterContentsProxy(
+          outer_contents_frame->GetSiteInstance());
+
+  // Swap the outer WebContents' initial frame for the inner WebContents with

[Charlie Reis, 2015/05/22 23:44:31]

WebContents's

[lazyboy, 2015/05/26 16:32:55]

Done.

+  // 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.
+  static_cast<RenderFrameHostImpl*>(outer_contents_frame)
+      ->frame_tree_node()
+      ->render_manager()
+      ->ReplaceWithInnerContentsProxy(proxy_to_outer_web_contents_routing_id);
+
+  GetRenderManager()->SetRWHViewForInnerContents(
+      GetRenderManager()->GetRenderWidgetHostView());
+}
+
 void WebContentsImpl::Stop() {
   GetRenderManager()->Stop();
   FOR_EACH_OBSERVER(WebContentsObserver, observers_, NavigationStopped());
@@ -1204,7 +1246,9 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
   WebContentsViewDelegate* delegate =
       GetContentClient()->browser()->GetWebContentsViewDelegate(this);
 
-  if (browser_plugin_guest_) {
+  if (browser_plugin_guest_ &&
+      !base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess)) {
     scoped_ptr<WebContentsView> platform_view(CreateWebContentsView(
         this, delegate, &render_view_host_delegate_view_));
 
@@ -1513,6 +1557,14 @@ void WebContentsImpl::CreateNewWindow(
   // SiteInstance in its own BrowsingInstance.
   bool is_guest = BrowserPluginGuest::IsGuest(this);
 
+  if (is_guest &&
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess)) {
+    // TODO(lazyboy): CreateNewWindow doesn't work for OOPIF-based <webview>
+    // yet.
+    NOTREACHED();
+  }
+
   // 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.
@@ -4140,7 +4192,11 @@ bool WebContentsImpl::CreateRenderViewForRenderManager(
   // 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_in_site_per_process =
+      !!browser_plugin_guest_.get() &&
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess);
+  if (!for_main_frame_navigation || is_guest_in_site_per_process) {
     RenderWidgetHostViewChildFrame* rwh_view_child =
         new RenderWidgetHostViewChildFrame(render_view_host);
     rwh_view = rwh_view_child;
@@ -4284,6 +4340,16 @@ bool WebContentsImpl::IsHidden() {
   return capturer_count_ == 0 && !should_normally_be_visible_;
 }
 
+int WebContentsImpl::GetOuterWebContentsFrameTreeNodeID() {
+  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();
 }
@@ -4294,6 +4360,7 @@ BrowserPluginGuest* WebContentsImpl::GetBrowserPluginGuest() const {
 
 void WebContentsImpl::SetBrowserPluginGuest(BrowserPluginGuest* guest) {
   CHECK(!browser_plugin_guest_);
+  CHECK(guest);
   browser_plugin_guest_.reset(guest);
 }