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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 17df925cac5d53f141d9c50c51170d30c6572d28..90664239d7dccce7a0afd1b9f84df0dfb7a182ad 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1010,6 +1010,8 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnSetAccessibilityMode)
     IPC_MESSAGE_HANDLER(FrameMsg_DisownOpener, OnDisownOpener)
     IPC_MESSAGE_HANDLER(FrameMsg_CommitNavigation, OnCommitNavigation)
+    IPC_MESSAGE_HANDLER(FrameMsg_ReplaceLocalFrameWithProxy,
+                        OnReplaceLocalFrameWithProxy)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(FrameMsg_SelectPopupMenuItems, OnSelectPopupMenuItems)
 #elif defined(OS_MACOSX)
@@ -3909,6 +3911,20 @@ void RenderFrameImpl::OnCommitNavigation(
       renderer_navigation_start);
 }
 
+void RenderFrameImpl::OnReplaceLocalFrameWithProxy(int proxy_routing_id) {
+  RenderFrameProxy* proxy_to_replace_frame = RenderFrameProxy::FromRoutingID(
+      proxy_routing_id);
+  DCHECK(proxy_to_replace_frame);
+
+  blink::WebRemoteFrame* web_frame =
+      blink::WebRemoteFrame::create(proxy_to_replace_frame);
+  proxy_to_replace_frame->SetWebRemoteFrame(web_frame);
+  proxy_to_replace_frame->web_frame()->initializeFromFrame(frame_);
+  frame_->swap(proxy_to_replace_frame->web_frame());
+  printf("**** done swap() ****\n");
+  render_view_->RegisterRenderFrameProxy(proxy_to_replace_frame);
+}
+
 WebNavigationPolicy RenderFrameImpl::DecidePolicyForNavigation(
     RenderFrame* render_frame,
     const NavigationPolicyInfo& info) {