[Patch 5 of 6] Split out the site_isolation_policy files

content/common/cross_site_document_classifier.h

Index: content/common/cross_site_document_classifier.h
diff --git a/content/child/site_isolation_policy.h b/content/common/cross_site_document_classifier.h
similarity index 40%
rename from content/child/site_isolation_policy.h
rename to content/common/cross_site_document_classifier.h
index acf24319729ab4549fdffcd3ac32016e15f00685..5f20463518c7154fdf405c736237fde8f83e4f41 100644
--- a/content/child/site_isolation_policy.h
+++ b/content/common/cross_site_document_classifier.h
@@ -1,58 +1,21 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// 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 CONTENT_CHILD_SITE_ISOLATION_POLICY_H_
-#define CONTENT_CHILD_SITE_ISOLATION_POLICY_H_
+#ifndef CONTENT_COMMON_CROSS_SITE_DOCUMENT_CLASSIFIER_H_
+#define CONTENT_COMMON_CROSS_SITE_DOCUMENT_CLASSIFIER_H_
 
-#include <map>
-#include <utility>
-
-#include "base/gtest_prod_util.h"
-#include "base/memory/linked_ptr.h"
+#include "base/basictypes.h"
 #include "base/strings/string_piece.h"
 #include "content/common/content_export.h"
-#include "content/public/common/resource_type.h"
 #include "url/gurl.h"
 
 namespace content {
 
-struct ResourceResponseInfo;
-
 // CrossSiteDocumentClassifier implements the cross-site document blocking
 // policy (XSDP) for Site Isolation. XSDP will monitor network responses to a
 // renderer and block illegal responses so that a compromised renderer cannot
 // steal private information from other sites.
-//
-// SiteIsolationStatsGatherer monitors responses to gather various UMA stats to
-// see the compatibility impact of actual deployment of the policy. The UMA stat
-// categories SiteIsolationStatsGatherer gathers are as follows:
-//
-// SiteIsolation.AllResponses : # of all network responses.
-// SiteIsolation.XSD.DataLength : the length of the first packet of a response.
-// SiteIsolation.XSD.MimeType (enum):
-//   # of responses from other sites, tagged with a document mime type.
-//   0:HTML, 1:XML, 2:JSON, 3:Plain, 4:Others
-// SiteIsolation.XSD.[%MIMETYPE].Blocked :
-//   blocked # of cross-site document responses grouped by sniffed MIME type.
-// SiteIsolation.XSD.[%MIMETYPE].Blocked.RenderableStatusCode :
-//   # of responses with renderable status code,
-//   out of SiteIsolation.XSD.[%MIMETYPE].Blocked.
-// SiteIsolation.XSD.[%MIMETYPE].Blocked.NonRenderableStatusCode :
-//   # of responses with non-renderable status code,
-//   out of SiteIsolation.XSD.[%MIMETYPE].Blocked.
-// SiteIsolation.XSD.[%MIMETYPE].NoSniffBlocked.RenderableStatusCode :
-//   # of responses failed to be sniffed for its MIME type, but blocked by
-//   "X-Content-Type-Options: nosniff" header, and with renderable status code
-//   out of SiteIsolation.XSD.[%MIMETYPE].Blocked.
-// SiteIsolation.XSD.[%MIMETYPE].NoSniffBlocked.NonRenderableStatusCode :
-//   # of responses failed to be sniffed for its MIME type, but blocked by
-//   "X-Content-Type-Options: nosniff" header, and with non-renderable status
-//   code out of SiteIsolation.XSD.[%MIMETYPE].Blocked.
-// SiteIsolation.XSD.[%MIMETYPE].NotBlocked :
-//   # of responses, but not blocked due to failure of mime sniffing.
-// SiteIsolation.XSD.[%MIMETYPE].NotBlocked.MaybeJS :
-//   # of responses that are plausibly sniffed to be JavaScript.
 
 enum CrossSiteDocumentMimeType {
   // Note that these values are used in histograms, and must not change.
@@ -64,53 +27,6 @@ enum CrossSiteDocumentMimeType {
   CROSS_SITE_DOCUMENT_MIME_TYPE_MAX,
 };
 
-struct SiteIsolationResponseMetaData {
-  SiteIsolationResponseMetaData();
-
-  std::string frame_origin;
-  GURL response_url;
-  ResourceType resource_type;
-  CrossSiteDocumentMimeType canonical_mime_type;
-  int http_status_code;
-  bool no_sniff;
-};
-
-// TODO(nick): Move this class into its own file.
-class CONTENT_EXPORT SiteIsolationStatsGatherer {
- public:
-  // Set activation flag for the UMA data collection for this renderer process.
-  static void SetEnabled(bool enabled);
-
-  // Returns any bookkeeping data about the HTTP header information for the
-  // request identified by |request_id|. Any data returned should then be
-  // passed to OnReceivedFirstChunk() with the first data chunk.
-  static linked_ptr<SiteIsolationResponseMetaData> OnReceivedResponse(
-      const GURL& frame_origin,
-      const GURL& response_url,
-      ResourceType resource_type,
-      int origin_pid,
-      const ResourceResponseInfo& info);
-
-  // Examines the first chunk of network data in case response_url is registered
-  // as a cross-site document by OnReceivedResponse(). This records various
-  // kinds of UMA data stats. This function is called only if the length of
-  // received data is non-zero.
-  static bool OnReceivedFirstChunk(
-      const linked_ptr<SiteIsolationResponseMetaData>& resp_data,
-      const char* payload,
-      int length);
- private:
-  FRIEND_TEST_ALL_PREFIXES(SiteIsolationStatsGathererTest, SniffForJS);
-
-  SiteIsolationStatsGatherer();  // Not instantiable.
-
-  // Imprecise JS sniffing; only appropriate for collecting UMA stat.
-  static bool SniffForJS(base::StringPiece data);
-
-  DISALLOW_COPY_AND_ASSIGN(SiteIsolationStatsGatherer);
-};
-
-// TODO(nick): Move this class into its own file.
 class CONTENT_EXPORT CrossSiteDocumentClassifier {
  public:
   // Returns the representative mime type enum value of the mime type of
@@ -150,4 +66,4 @@ class CONTENT_EXPORT CrossSiteDocumentClassifier {
 
 }  // namespace content
 
-#endif  // CONTENT_CHILD_SITE_ISOLATION_POLICY_H_
+#endif  // CONTENT_COMMON_CROSS_SITE_DOCUMENT_CLASSIFIER_H_