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

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index c9eadcd6b1c225509c0589d4de42abc983e7aeb9..200b0710f52079cd32776933b6c35b8b7a945ebc 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -160,6 +160,22 @@ RenderFrameProxyHost* RenderFrameHostManager::GetProxyToParent() {
   return iter->second;
 }
 
+RenderFrameProxyHost* RenderFrameHostManager::GetProxyToEmbedder() {
+  int64 embedder_frame_tree_node_id = delegate_->GetEmbedderFrameTreeNodeID();
+  FrameTreeNode* embedder_frame_tree_node =
+      FrameTreeNode::GloballyFindByID(embedder_frame_tree_node_id);
+  if (!embedder_frame_tree_node)
+    return nullptr;
+
+  return GetRenderFrameProxyHost(
+      embedder_frame_tree_node->current_frame_host()->GetSiteInstance());
+}
+
+bool RenderFrameHostManager::IsGuest() {
+  return frame_tree_node_->IsMainFrame() &&
+         delegate_->GetEmbedderFrameTreeNodeID() != -1;
+}
+
 void RenderFrameHostManager::SetPendingWebUI(const GURL& url, int bindings) {
   pending_web_ui_ = CreateWebUI(url, bindings);
   pending_and_current_web_ui_.reset();
@@ -460,6 +476,14 @@ void RenderFrameHostManager::DidNavigateFrame(
 void RenderFrameHostManager::CommitPendingIfNecessary(
     RenderFrameHostImpl* render_frame_host,
     bool was_caused_by_user_gesture) {
+  RenderFrameProxyHost* proxy_to_embedder = GetProxyToEmbedder();
+  if (proxy_to_embedder) {
+    DCHECK(render_frame_host->GetSiteInstance()->GetSiteURL().SchemeIs(
+        "chrome-guest"));
+    // TODO(lazyboy): This probably breaks guest visibility.
+    current_host()->GetView()->Show();
+  }
+
   if (!pending_render_frame_host_ && !speculative_render_frame_host_) {
     DCHECK_IMPLIES(should_reuse_web_ui_, web_ui_);
 
@@ -1602,6 +1626,35 @@ void RenderFrameHostManager::EnsureRenderViewInitialized(
                  source->IsMainFrame());
 }
 
+int RenderFrameHostManager::CreateEmbedderProxy(
+    SiteInstance* embedder_site_instance) {
+  DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(

[nasko, 2015/05/05 21:34:49]

nit: CHECK is fine too : )

[lazyboy, 2015/05/05 22:33:53]

Done.

+      switches::kSitePerProcess));
+  int embedder_proxy_flags = CREATE_RF_HIDDEN | CREATE_RF_SWAPPED_OUT |
+                             CREATE_RF_FOR_MAIN_FRAME_NAVIGATION;
+  int swapped_out_render_view_routing_id;  // Unused.
+  scoped_ptr<RenderFrameHostImpl> swapped_out_embedder_rfh = CreateRenderFrame(
+      embedder_site_instance, nullptr,
+      MSG_ROUTING_NONE,  // opener_route_id
+      embedder_proxy_flags, &swapped_out_render_view_routing_id);
+
+  RenderFrameProxyHost* rfph_in_embedder =
+      GetRenderFrameProxyHost(embedder_site_instance);
+  DCHECK(rfph_in_embedder);

[nasko, 2015/05/05 21:34:49]

nit: CHECK

[lazyboy, 2015/05/05 22:33:53]

Done.

+  return rfph_in_embedder->GetRoutingID();
+}
+
+void RenderFrameHostManager::ReplaceWithGuestProxy(
+    int proxy_to_embedder_routing_id) {
+  current_frame_host()->Send(new FrameMsg_SwapOut(
+      current_frame_host()->GetRoutingID(), proxy_to_embedder_routing_id,
+      false /* is_loading */, content::FrameReplicationState()));
+}
+
+void RenderFrameHostManager::SetGuestRWHView(RenderWidgetHostView* child_rwhv) {
+  GetProxyToEmbedder()->SetChildRWHView(child_rwhv);
+}
+
 bool RenderFrameHostManager::InitRenderView(
     RenderViewHostImpl* render_view_host,
     int opener_route_id,