UI Changes to support clearing EME/CDM data

chrome/browser/browsing_data/media_license_counter.h

+// Copyright (c) 2016 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_BROWSING_DATA_MEDIA_LICENSE_COUNTER_H_

[xhwang, 2016/06/17 06:24:30]

This file should be media_license*s*_counter.h to be consistent with the UI and
pref.

[jrummell, 2016/06/21 00:13:44]

Hmmm. There is autofill_counter, cache_counter, but also hosted_apps_counter and
passwords_counter. Changed.

+#define CHROME_BROWSER_BROWSING_DATA_MEDIA_LICENSE_COUNTER_H_
+
+#include <set>
+#include <string>
+
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/browsing_data/browsing_data_counter.h"
+#include "url/gurl.h"
+
+// MediaLicenseCounter is used to determine the number of origins that
+// have plugin private filesystem data (used by EME). It does not include
+// origins that have content licenses owned by Flash.
+class MediaLicenseCounter : public BrowsingDataCounter {
+ public:
+  // MediaLicenseResult is the result of counting the number of origins
+  // that have plugin private filesystem data. It also contains one of the
+  // origins so that a message can displayed providing an example of the
+  // origins that hold content licenses.
+  class MediaLicenseResult : public FinishedResult {
+   public:
+    MediaLicenseResult(const MediaLicenseCounter* source,
+                       std::set<GURL> origins);

[xhwang, 2016/06/17 06:24:30]

pass origins by const-ref to avoid copy?

[jrummell, 2016/06/21 00:13:44]

Done.

+    ~MediaLicenseResult() override;
+
+    const std::string& GetOneOrigin() const;
+
+   private:
+    std::string one_origin_;
+  };
+
+  MediaLicenseCounter();
+  ~MediaLicenseCounter() override;
+
+  // BrowsingDataCounter implementation.
+  const std::string& GetPrefName() const final;
+
+ private:
+  // BrowsingDataCounter implementation.
+  void Count() final;
+
+  // Determining the set of origins used by the plugin private filesystem is
+  // done asynchronously. This callback returns the results, which are
+  // subsequently reported.
+  void OnContentLicensesObtained(std::set<GURL> origins);

[xhwang, 2016/06/17 06:24:30]

pass by const ref

[jrummell, 2016/06/21 00:13:44]

Done.

+
+  const std::string pref_name_;
+  base::WeakPtrFactory<MediaLicenseCounter> weak_ptr_factory_;
+};
+
+#endif  // CHROME_BROWSER_BROWSING_DATA_MEDIA_LICENSE_COUNTER_H_