[Android] Prompt with infobar on filename conflict

chrome/browser/ui/android/infobars/download_overwrite_infobar.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_
+#define CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "base/basictypes.h"
+#include "chrome/browser/ui/android/infobars/infobar_android.h"
+
+namespace chrome {
+namespace android {
+class DownloadOverwriteInfoBarDelegate;
+}
+}
+
+// A native-side implementation of an infobar to ask whether to overwrite
+// an existing file with a new download.
+class DownloadOverwriteInfoBar : public InfoBarAndroid {

[Peter Kasting, 2015/02/18 00:51:31]

Instead of adding this class, the Java-side class, and the new constants in
InfoBarAndroid's ActionType, can't we just use a ConfirmInfoBar?  That already
allows you to display a custom message and two buttons with custom text, which
is all you seem to need here.  You wouldn't have snazzy styling of the file and
directory names within the message, but does that really matter?  (If it does,
perhaps ConfirmInfoBar should be able to pass along some styling info to the
Java side?)

[Changwan Ryu, 2015/02/18 07:15:03]

I discussed this with tedchoc@ and newt@. Because we do not provide a style
generator and intent link generator in the native side, we decided to make a new
info bar instead.

+ public:
+  static scoped_ptr<infobars::InfoBar> CreateInfoBar(
+      scoped_ptr<chrome::android::DownloadOverwriteInfoBarDelegate> delegate);
+  ~DownloadOverwriteInfoBar() override;
+
+ private:
+  explicit DownloadOverwriteInfoBar(
+      scoped_ptr<chrome::android::DownloadOverwriteInfoBarDelegate> delegate);
+
+  // InfoBarAndroid:
+  base::android::ScopedJavaLocalRef<jobject> CreateRenderInfoBar(
+      JNIEnv* env) override;
+  void ProcessButton(int action, const std::string& action_value) override;
+
+  chrome::android::DownloadOverwriteInfoBarDelegate* GetDelegate();
+
+  base::android::ScopedJavaGlobalRef<jobject> java_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(DownloadOverwriteInfoBar);
+};
+
+// Registers the native methods through JNI.
+bool RegisterDownloadOverwriteInfoBarDelegate(JNIEnv* env);
+
+#endif  // CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_