[Android] Prompt with infobar on filename conflict

components/infobars/core/infobar_delegate.h

Index: components/infobars/core/infobar_delegate.h
diff --git a/components/infobars/core/infobar_delegate.h b/components/infobars/core/infobar_delegate.h
index 10cb34cfd31f5ccb171ab295011c36880b07de41..22a9d8901b2f87068f8422ecf14c69ba4429da8a 100644
--- a/components/infobars/core/infobar_delegate.h
+++ b/components/infobars/core/infobar_delegate.h
@@ -20,6 +20,14 @@ class ScreenCaptureInfoBarDelegate;
 class ThemeInstalledInfoBarDelegate;
 class ThreeDAPIInfoBarDelegate;
 
+#if defined(OS_ANDROID)
+namespace chrome {
+namespace android {
+class DownloadOverwriteInfoBarDelegate;
+}
+}
+#endif
+
 namespace translate {
 class TranslateInfoBarDelegate;
 }
@@ -116,6 +124,11 @@ class InfoBarDelegate {
   virtual ThemeInstalledInfoBarDelegate* AsThemePreviewInfobarDelegate();
   virtual translate::TranslateInfoBarDelegate* AsTranslateInfoBarDelegate();
 
+#if defined(OS_ANDROID)
+  virtual chrome::android::DownloadOverwriteInfoBarDelegate*
+      AsDownloadOverwriteInfoBarDelegate();
+#endif
+
   void set_infobar(InfoBar* infobar) { infobar_ = infobar; }
 
   // Store the unique id for the active entry, to be used later upon navigation