Let the incognito window print.

Provide the original profile to incognito so that users can still use
their printers.

BUG=678796

Review-Url: https://codereview.chromium.org/2610373003
Cr-Commit-Position: refs/heads/master@{#441812}

chrome/browser/chromeos/printing/printer_pref_manager_factory.cc

@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/printing/printer_pref_manager_factory.h"
 
+#include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/browser_context.h"
@@ -30,6 +31,11 @@ PrinterPrefManagerFactory* PrinterPrefManagerFactory::GetInstance() {
   return g_printer_pref_manager.Pointer();
 }
 
+content::BrowserContext* PrinterPrefManagerFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextRedirectedInIncognito(context);
+}
+
 PrinterPrefManagerFactory::PrinterPrefManagerFactory()
     : BrowserContextKeyedServiceFactory(
           "PrinterPrefManager",

chrome/browser/chromeos/printing/printer_pref_manager_factory.h

@@ -23,6 +23,10 @@ class PrinterPrefManagerFactory : public BrowserContextKeyedServiceFactory {
 
   static PrinterPrefManagerFactory* GetInstance();
 
+ protected:
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
  private:
   friend struct base::DefaultLazyInstanceTraits<PrinterPrefManagerFactory>;