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

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 72eb2f452eb456366ec24113989a08dc27111bf1..33bd4db38d076ba93984acfe125a608552e0de2e 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -505,6 +505,12 @@ IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
                     content::CommonNavigationParams, /* common_params */
                     content::RequestNavigationParams /* request_params */)
 
+// Replace this frame with a RenderFrameProxy whose routing ID is
+// |proxy_routing_id|.
+// The proxy points to a guest process.

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

Please rephrase (same "proxy points" issue).

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

Done.

+IPC_MESSAGE_ROUTED1(FrameMsg_ReplaceLocalFrameWithProxy,
+                    int32 /* proxy_routing_id */)
+
 #if defined(ENABLE_PLUGINS)
 // Notifies the renderer of updates to the Plugin Power Saver origin whitelist.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdatePluginContentOriginWhitelist,