Add a HostContentSettingsMap layer for Supervised Users.

components/content_settings/core/browser/content_settings_binary_value_map.cc

Index: components/content_settings/core/browser/content_settings_binary_value_map.cc
diff --git a/components/content_settings/core/browser/content_settings_binary_value_map.cc b/components/content_settings/core/browser/content_settings_binary_value_map.cc
new file mode 100644
index 0000000000000000000000000000000000000000..136d3874dd10f265ffb9395203f6aab4bdc23235
--- /dev/null
+++ b/components/content_settings/core/browser/content_settings_binary_value_map.cc
@@ -0,0 +1,65 @@
+// Copyright (c) 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.
+
+#include "components/content_settings/core/browser/content_settings_binary_value_map.h"
+
+#include "base/synchronization/lock.h"
+#include "components/content_settings/core/browser/content_settings_rule.h"
+#include "components/content_settings/core/common/content_settings.h"
+
+namespace content_settings {
+
+namespace {
+
+class RuleIteratorBinary : public RuleIterator {
+ public:
+  explicit RuleIteratorBinary(bool is_enabled,
+                              scoped_ptr<base::AutoLock> auto_lock)
+      : is_done_(is_enabled), auto_lock_(auto_lock.Pass()) {}
+
+  bool HasNext() const override { return !is_done_; }
+
+  Rule Next() override {
+    DCHECK(!is_done_);
+    is_done_ = true;
+    return Rule(ContentSettingsPattern::Wildcard(),
+                ContentSettingsPattern::Wildcard(),
+                new base::FundamentalValue(CONTENT_SETTING_BLOCK));
+  }
+
+ private:
+  bool is_done_;
+  scoped_ptr<base::AutoLock> auto_lock_;
+};
+
+}  // namespace
+
+BinaryValueMap::BinaryValueMap() {
+  for (bool& enabled : is_enabled_) {
+    enabled = true;
+  }
+}
+
+RuleIterator* BinaryValueMap::GetRuleIterator(
+    ContentSettingsType content_type,
+    const ResourceIdentifier& resource_identifier,
+    scoped_ptr<base::AutoLock> auto_lock) const {
+  if (resource_identifier.empty()) {
+    return new RuleIteratorBinary(IsContentSettingEnabled(content_type),
+                                  auto_lock.Pass());
+  }
+  return new EmptyRuleIterator();
+}
+
+void BinaryValueMap::SetContentSettingDisabled(ContentSettingsType content_type,
+                                               bool is_disabled) {
+  is_enabled_[content_type] = !is_disabled;
+}
+
+bool BinaryValueMap::IsContentSettingEnabled(
+    ContentSettingsType content_type) const {
+  return is_enabled_[content_type];
+}
+
+}  // namespace content_settings