UI Changes to support clearing EME/CDM data

chrome/browser/browsing_data/media_licenses_counter.h

Index: chrome/browser/browsing_data/media_licenses_counter.h
diff --git a/chrome/browser/browsing_data/media_licenses_counter.h b/chrome/browser/browsing_data/media_licenses_counter.h
new file mode 100644
index 0000000000000000000000000000000000000000..44c0f2f46a94d67c086cc6fc0c7e7709e6ae74b2
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+++ b/chrome/browser/browsing_data/media_licenses_counter.h
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+// Copyright 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_LICENSES_COUNTER_H_
+#define CHROME_BROWSER_BROWSING_DATA_MEDIA_LICENSES_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"
+
+// MediaLicensesCounter 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 MediaLicensesCounter : 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 MediaLicensesCounter* source,
+                       const std::set<GURL>& origins);
+    ~MediaLicenseResult() override;
+
+    const std::string& GetOneOrigin() const;
+
+   private:
+    std::string one_origin_;
+  };
+
+  MediaLicensesCounter();
+  ~MediaLicensesCounter() 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(const std::set<GURL>& origins);
+
+  const std::string pref_name_;
+  base::WeakPtrFactory<MediaLicensesCounter> weak_ptr_factory_;
+};
+
+#endif  // CHROME_BROWSER_BROWSING_DATA_MEDIA_LICENSES_COUNTER_H_