Convert Pass()→std::move() for iOS build.

ios/web/public/web_controller_factory.mm

Index: ios/web/public/web_controller_factory.mm
diff --git a/ios/web/public/web_controller_factory.mm b/ios/web/public/web_controller_factory.mm
index fe4641b7a82446fef03225f7c4bbd3d4f1fd6883..0235ea77e45dccf8a2d75651f39f5615ec16085d 100644
--- a/ios/web/public/web_controller_factory.mm
+++ b/ios/web/public/web_controller_factory.mm
@@ -4,6 +4,8 @@
 
 #import "ios/web/public/web_controller_factory.h"
 
+#include <utility>
+
 #include "ios/web/public/browser_state.h"
 #import "ios/web/web_state/ui/crw_ui_web_view_web_controller.h"
 #import "ios/web/web_state/ui/crw_wk_web_view_web_controller.h"
@@ -15,11 +17,11 @@ CRWWebController* CreateWebController(WebViewType web_view_type,
                                       scoped_ptr<WebStateImpl> web_state) {
   switch (web_view_type) {
     case UI_WEB_VIEW_TYPE:
-      return
-          [[CRWUIWebViewWebController alloc] initWithWebState:web_state.Pass()];
+      return [[CRWUIWebViewWebController alloc]
+          initWithWebState:std::move(web_state)];
     case WK_WEB_VIEW_TYPE:
-      return
-          [[CRWWKWebViewWebController alloc] initWithWebState:web_state.Pass()];
+      return [[CRWWKWebViewWebController alloc]
+          initWithWebState:std::move(web_state)];
   }
   NOTREACHED();
   return nil;
@@ -30,7 +32,7 @@ CRWWebController* CreateWebController(WebViewType web_view_type,
   DCHECK(browser_state);
   scoped_ptr<web::WebStateImpl> web_state(new web::WebStateImpl(browser_state));
   web_state->GetNavigationManagerImpl().InitializeSession(nil, nil, NO, -1);
-  return CreateWebController(web_view_type, web_state.Pass());
+  return CreateWebController(web_view_type, std::move(web_state));
 }
 
 }  // namespace web