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 67ac9fb4fdd2a37d3fdc440e6007363388ee35b8..c8e69a878a386189b76c0ae6ff2ecc29698d62d1 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1013,6 +1013,8 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnMoveRangeSelectionExtent)
     IPC_MESSAGE_HANDLER(InputMsg_Replace, OnReplace)
     IPC_MESSAGE_HANDLER(InputMsg_ReplaceMisspelling, OnReplaceMisspelling)
+    IPC_MESSAGE_HANDLER(FrameMsg_ReplaceLocalFrameWithProxy,
+                        OnReplaceLocalFrameWithProxy)
     IPC_MESSAGE_HANDLER(InputMsg_ExtendSelectionAndDelete,
                         OnExtendSelectionAndDelete)
     IPC_MESSAGE_HANDLER(InputMsg_SetCompositionFromExistingText,
@@ -4080,6 +4082,20 @@ 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);

[Charlie Reis, 2015/04/08 23:42:12]

Please check with Lucas about this, since he and Daniel have a better sense for
the swap semantics.

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

Acknowledged.
Lucas and I discussed about this initially, will check back again.

+}
+
 WebNavigationPolicy RenderFrameImpl::DecidePolicyForNavigation(
     RenderFrame* render_frame,
     const NavigationPolicyInfo& info) {