Use GuestViewBase for creating constrained windows instead of WebViewGuest.

This will allow features that use constrained windows (e.g. printing)
  work on all guest views: app-view/web-view/mime-handler-view, etc.

BUG=411765
Test=This is internal only for now, nothing visible,
  once the full support for printing and saving mime-handler-view lands
  it will be used.

Review URL: https://codereview.chromium.org/552013005

Cr-Commit-Position: refs/heads/master@{#293898}

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.mm

@@ -14,7 +14,7 @@
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
-#include "extensions/browser/guest_view/web_view/web_view_guest.h"
+#include "extensions/browser/guest_view/guest_view_base.h"
 
 using web_modal::WebContentsModalDialogManager;
 using web_modal::NativeWebContentsModalDialog;
@@ -28,12 +28,12 @@ ConstrainedWindowMac::ConstrainedWindowMac(
       sheet_([sheet retain]),
       shown_(false) {
   DCHECK(web_contents);
-  extensions::WebViewGuest* web_view_guest =
-    extensions::WebViewGuest::FromWebContents(web_contents);
+  extensions::GuestViewBase* guest_view =
+      extensions::GuestViewBase::FromWebContents(web_contents);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
-  web_contents_ = web_view_guest && web_view_guest->embedder_web_contents() ?
-                      web_view_guest->embedder_web_contents() : web_contents;
+  web_contents_ = guest_view && guest_view->embedder_web_contents() ?
+                      guest_view->embedder_web_contents() : web_contents;
   DCHECK(sheet_.get());
   web_modal::PopupManager* popup_manager =
       web_modal::PopupManager::FromWebContents(web_contents_);

chrome/browser/ui/views/constrained_window_views.cc

@@ -9,7 +9,7 @@
 #include "chrome/browser/ui/browser_finder.h"
 #include "components/web_modal/popup_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
-#include "extensions/browser/guest_view/web_view/web_view_guest.h"
+#include "extensions/browser/guest_view/guest_view_base.h"
 #include "ui/views/border.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
@@ -123,13 +123,13 @@ void UpdateBrowserModalDialogPosition(views::Widget* widget,
 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents) {
-  extensions::WebViewGuest* web_view_guest =
-      extensions::WebViewGuest::FromWebContents(initiator_web_contents);
+  extensions::GuestViewBase* guest_view =
+      extensions::GuestViewBase::FromWebContents(initiator_web_contents);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
   content::WebContents* web_contents =
-      web_view_guest && web_view_guest->embedder_web_contents() ?
-          web_view_guest->embedder_web_contents() : initiator_web_contents;
+      guest_view && guest_view->embedder_web_contents() ?
+          guest_view->embedder_web_contents() : initiator_web_contents;
   views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
   web_modal::PopupManager* popup_manager =
       web_modal::PopupManager::FromWebContents(web_contents);