components: Create web_modal component.

chrome/browser/ui/views/extensions/native_app_window_views.cc

Index: chrome/browser/ui/views/extensions/native_app_window_views.cc
diff --git a/chrome/browser/ui/views/extensions/native_app_window_views.cc b/chrome/browser/ui/views/extensions/native_app_window_views.cc
index 9c4292c9ea75bb512ca824c8b72be046bcbd20ae..fcc73ef142497326c8a1fb119cae07a8d83d9dcb 100644
--- a/chrome/browser/ui/views/extensions/native_app_window_views.cc
+++ b/chrome/browser/ui/views/extensions/native_app_window_views.cc
@@ -417,11 +417,11 @@ gfx::Point NativeAppWindowViews::GetDialogPosition(const gfx::Size& size) {
 }
 
 void NativeAppWindowViews::AddObserver(
-    WebContentsModalDialogHostObserver* observer) {
+    web_modal::WebContentsModalDialogHostObserver* observer) {
   observer_list_.AddObserver(observer);
 }
 void NativeAppWindowViews::RemoveObserver(
-    WebContentsModalDialogHostObserver* observer) {
+    web_modal::WebContentsModalDialogHostObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
@@ -481,7 +481,7 @@ void NativeAppWindowViews::OnViewWasResized() {
     web_contents()->GetRenderViewHost()->GetView()->SetClickthroughRegion(rgn);
 #endif
 
-  FOR_EACH_OBSERVER(WebContentsModalDialogHostObserver,
+  FOR_EACH_OBSERVER(web_modal::WebContentsModalDialogHostObserver,
                     observer_list_,
                     OnPositionRequiresUpdate());
 }