Fill is_chrome_signin_password field in the password entry pings.

components/password_manager/core/browser/password_reuse_detector.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_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_
 
 #include <stdint.h>
 #include <map>
 #include <memory>
@@ skipping 11 matching lines @@
 
 namespace password_manager {
 
 class PasswordReuseDetectorConsumer;
 
 // Comparator that compares reversed strings.
 struct ReverseStringLess {
   bool operator()(const base::string16& lhs, const base::string16& rhs) const;
 };
 
+// Used to identify chrome sync password in password entry event.
+extern const char kSyncPasswordDomain[];
+
 // Per-profile class responsible for detection of password reuse, i.e. that the
 // user input on some site contains the password saved on another site.
 // It receives saved passwords through PasswordStoreConsumer interface.
 // It stores passwords in memory and CheckReuse() can be used for finding
 // a password reuse.
 class PasswordReuseDetector : public PasswordStoreConsumer {
  public:
   explicit PasswordReuseDetector(PrefService* prefs);
   ~PasswordReuseDetector() override;
 
@@ skipping 56 matching lines @@
 
   base::Optional<uint64_t> sync_password_hash_;
   PrefService* const prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordReuseDetector);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_