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

extensions/browser/guest_view/web_view/web_view_guest.cc

Index: extensions/browser/guest_view/web_view/web_view_guest.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.cc b/extensions/browser/guest_view/web_view/web_view_guest.cc
index 7a5f4f2dada3c527fbafb8038960f730d785daed..ebcc476974f629de55f9762f510e55914450e8e7 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.cc
+++ b/extensions/browser/guest_view/web_view/web_view_guest.cc
@@ -4,6 +4,7 @@
 
 #include "extensions/browser/guest_view/web_view/web_view_guest.h"
 
+#include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ -30,6 +31,7 @@
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/media_stream_request.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/result_codes.h"
@@ -55,6 +57,7 @@
 #include "url/url_constants.h"
 
 using base::UserMetricsAction;
+using content::GlobalRequestID;
 using content::RenderFrameHost;
 using content::ResourceType;
 using content::StoragePartition;
@@ -977,14 +980,14 @@ void WebViewGuest::NavigateGuest(const std::string& src,
   // if the navigation is embedder-initiated. For browser-initiated navigations,
   // content scripts will be ready.
   if (force_navigation) {
-    SignalWhenReady(
-        base::Bind(&WebViewGuest::LoadURLWithParams,
-                   weak_ptr_factory_.GetWeakPtr(), url, content::Referrer(),
-                   ui::PAGE_TRANSITION_AUTO_TOPLEVEL, force_navigation));
+    SignalWhenReady(base::Bind(
+        &WebViewGuest::LoadURLWithParams, weak_ptr_factory_.GetWeakPtr(), url,
+        content::Referrer(), ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
+        GlobalRequestID(), force_navigation));
     return;
   }
   LoadURLWithParams(url, content::Referrer(), ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
-                    force_navigation);
+                    GlobalRequestID(), force_navigation);
 }
 
 bool WebViewGuest::HandleKeyboardShortcuts(
@@ -1246,6 +1249,7 @@ content::WebContents* WebViewGuest::OpenURLFromTab(
   // about:blank.
   if (params.disposition == CURRENT_TAB) {
     LoadURLWithParams(params.url, params.referrer, params.transition,
+                      params.transferred_global_request_id,
                       true /* force_navigation */);
     return web_contents();
   }
@@ -1301,10 +1305,12 @@ bool WebViewGuest::IsFullscreenForTabOrPending(
   return is_guest_fullscreen_;
 }
 
-void WebViewGuest::LoadURLWithParams(const GURL& url,
-                                     const content::Referrer& referrer,
-                                     ui::PageTransition transition_type,
-                                     bool force_navigation) {
+void WebViewGuest::LoadURLWithParams(
+    const GURL& url,
+    const content::Referrer& referrer,
+    ui::PageTransition transition_type,
+    const GlobalRequestID& transferred_global_request_id,
+    bool force_navigation) {
   // Do not allow navigating a guest to schemes other than known safe schemes.
   // This will block the embedder trying to load unwanted schemes, e.g.
   // chrome://.
@@ -1333,6 +1339,7 @@ void WebViewGuest::LoadURLWithParams(const GURL& url,
   load_url_params.referrer = referrer;
   load_url_params.transition_type = transition_type;
   load_url_params.extra_headers = std::string();
+  load_url_params.transferred_global_request_id = transferred_global_request_id;
   if (is_overriding_user_agent_) {
     load_url_params.override_user_agent =
         content::NavigationController::UA_OVERRIDE_TRUE;