JavaScript dialogs cause a page to lose fullscreen.

chrome/browser/printing/print_job_worker.cc

Index: chrome/browser/printing/print_job_worker.cc
diff --git a/chrome/browser/printing/print_job_worker.cc b/chrome/browser/printing/print_job_worker.cc
index d06b61aaf6193e83ca91c3d8865317ca21096148..9faecd1874cb7882e68aabc25edb0bfdfda00eb6 100644
--- a/chrome/browser/printing/print_job_worker.cc
+++ b/chrome/browser/printing/print_job_worker.cc
@@ -216,12 +216,13 @@ void PrintJobWorker::GetSettingsWithUI(
     bool is_scripted) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
+  PrintingContextDelegate* printing_context_delegate =
+      static_cast<PrintingContextDelegate*>(printing_context_delegate_.get());
+  content::WebContents* web_contents =
+      printing_context_delegate->GetWebContents();
+
 #if defined(OS_ANDROID)
   if (is_scripted) {
-    PrintingContextDelegate* printing_context_delegate =
-        static_cast<PrintingContextDelegate*>(printing_context_delegate_.get());
-    content::WebContents* web_contents =
-        printing_context_delegate->GetWebContents();
     TabAndroid* tab =
         web_contents ? TabAndroid::FromWebContents(web_contents) : nullptr;
 
@@ -233,6 +234,11 @@ void PrintJobWorker::GetSettingsWithUI(
   }
 #endif
 
+  // Running a dialog causes an exit to webpage-initiated fullscreen.
+  // http://crbug.com/728276
+  if (web_contents->IsFullscreenForCurrentTab())
+    web_contents->ExitFullscreen(false);
+
   // weak_factory_ creates pointers valid only on owner_ thread.
   printing_context_->AskUserForSettings(
       document_page_count, has_selection, is_scripted,