Move DocumentSubresourceFilter to core/common.

components/subresource_filter/content/common/document_subresource_filter.h

-// 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 COMPONENTS_SUBRESOURCE_FILTER_CONTENT_COMMON_DOCUMENT_SUBRESOURCE_FILTER_H_
-#define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_COMMON_DOCUMENT_SUBRESOURCE_FILTER_H_
-
-#include <stddef.h>
-
-#include <memory>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "components/subresource_filter/content/common/document_load_statistics.h"
-#include "components/subresource_filter/core/common/activation_level.h"
-#include "components/subresource_filter/core/common/activation_state.h"
-#include "components/subresource_filter/core/common/indexed_ruleset.h"
-#include "components/subresource_filter/core/common/proto/rules.pb.h"
-#include "third_party/WebKit/public/platform/WebDocumentSubresourceFilter.h"
-#include "url/gurl.h"
-#include "url/origin.h"
-
-namespace subresource_filter {
-
-class FirstPartyOrigin;
-class MemoryMappedRuleset;
-
-// Computes whether/how subresource filtering should be activated while loading
-// |document_url| in a frame, based on the parent document's |activation_state|,
-// the |parent_document_origin|, as well as any applicable deactivation rules in
-// non-null |ruleset|.
-ActivationState ComputeActivationState(
-    const GURL& document_url,
-    const url::Origin& parent_document_origin,
-    const ActivationState& parent_activation_state,
-    const MemoryMappedRuleset* ruleset);
-
-// Same as above, but instead of relying on the pre-computed activation state of
-// the parent, computes the activation state for a frame from scratch, based on
-// the page-level activation options |activation_level| and
-// |measure_performance|; as well as any deactivation rules in |ruleset| that
-// apply to |ancestor_document_urls|.
-//
-// TODO(pkalinnikov): Remove this when browser-side navigation is supported.
-ActivationState ComputeActivationState(
-    ActivationLevel activation_level,
-    bool measure_performance,
-    const std::vector<GURL>& ancestor_document_urls,
-    const MemoryMappedRuleset* ruleset);
-
-// Performs filtering of subresource loads in the scope of a given document.
-class DocumentSubresourceFilter
-    : public blink::WebDocumentSubresourceFilter,
-      public base::SupportsWeakPtr<DocumentSubresourceFilter> {
- public:
-  // Constructs a new filter that will:
-  //  -- Operate in a manner prescribed in |activation_state|.
-  //  -- Filter subresource loads in the scope of a document loaded from
-  //     |document_origin|.
-  //  -- Hold a reference to and use |ruleset| for its entire lifetime.
-  //  -- Invoke |first_disallowed_load_callback|, if it is non-null, on the
-  //     first disallowed subresource load.
-  DocumentSubresourceFilter(url::Origin document_origin,
-                            ActivationState activation_state,
-                            scoped_refptr<const MemoryMappedRuleset> ruleset,
-                            base::OnceClosure first_disallowed_load_callback);
-
-  ~DocumentSubresourceFilter() override;
-
-  const DocumentLoadStatistics& statistics() const { return statistics_; }
-  bool is_performance_measuring_enabled() const {
-    return activation_state_.measure_performance;
-  }
-
-  // blink::WebDocumentSubresourceFilter:
-  LoadPolicy getLoadPolicy(const blink::WebURL& resourceUrl,
-                           blink::WebURLRequest::RequestContext) override;
-  void reportDisallowedLoad() override;
-
-  LoadPolicy GetLoadPolicyForSubdocument(const GURL& subdocument_url);
-
- private:
-  LoadPolicy EvaluateLoadPolicy(const GURL& resource_url,
-                                proto::ElementType element_type);
-
-  const ActivationState activation_state_;
-  const scoped_refptr<const MemoryMappedRuleset> ruleset_;
-  const IndexedRulesetMatcher ruleset_matcher_;
-
-  // Equals nullptr iff |activation_state_.filtering_disabled_for_document|.
-  std::unique_ptr<FirstPartyOrigin> document_origin_;
-
-  base::OnceClosure first_disallowed_load_callback_;
-  DocumentLoadStatistics statistics_;
-
-  DISALLOW_COPY_AND_ASSIGN(DocumentSubresourceFilter);
-};
-
-}  // namespace subresource_filter
-
-#endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_COMMON_DOCUMENT_SUBRESOURCE_FILTER_H_