Support to remove passwords by date_synced timestamp.

The new method RemoveLoginsSyncedBetween() works exactly like the existing RemoveLoginsCreatedBetween(). 

BUG=362679
TBR=zea@chromium.org

Review URL: https://codereview.chromium.org/335893002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277863 0039d316-1c4b-4281-b951-d872f2087c98

24 files changed, 727 insertions, 185 deletions

diff --git a/chrome/browser/password_manager/native_backend_gnome_x.cc b/chrome/browser/password_manager/native_backend_gnome_x.cc
index 6b4236a..7dd651e 100644
--- a/chrome/browser/password_manager/native_backend_gnome_x.cc
+++ b/chrome/browser/password_manager/native_backend_gnome_x.cc
@@ -642,26 +642,17 @@ bool NativeBackendGnome::RemoveLogin(const PasswordForm& form) {
   return true;
 }
 
-bool NativeBackendGnome::RemoveLoginsCreatedBetween(
-    const base::Time& delete_begin,
-    const base::Time& delete_end) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
-  bool ok = true;
-  // We could walk the list and delete items as we find them, but it is much
-  // easier to build the list and use RemoveLogin() to delete them.
-  PasswordFormList forms;
-  if (!GetAllLogins(&forms))
-    return false;
+bool NativeBackendGnome::RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                                    base::Time delete_end) {
+  return RemoveLoginsBetween(
+      delete_begin, delete_end, CREATION_TIMESTAMP, NULL);
+}
 
-  for (size_t i = 0; i < forms.size(); ++i) {
-    if (delete_begin <= forms[i]->date_created &&
-        (delete_end.is_null() || forms[i]->date_created < delete_end)) {
-      if (!RemoveLogin(*forms[i]))
-        ok = false;
-    }
-    delete forms[i];
-  }
-  return ok;
+bool NativeBackendGnome::RemoveLoginsSyncedBetween(
+    base::Time delete_begin,
+    base::Time delete_end,
+    password_manager::PasswordStoreChangeList* changes) {
+  return RemoveLoginsBetween(delete_begin, delete_end, SYNC_TIMESTAMP, changes);
 }
 
 bool NativeBackendGnome::GetLogins(const PasswordForm& form,
@@ -683,27 +674,10 @@ bool NativeBackendGnome::GetLogins(const PasswordForm& form,
   return true;
 }
 
-bool NativeBackendGnome::GetLoginsCreatedBetween(const base::Time& get_begin,
-                                                 const base::Time& get_end,
+bool NativeBackendGnome::GetLoginsCreatedBetween(base::Time get_begin,
+                                                 base::Time get_end,
                                                  PasswordFormList* forms) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
-  // We could walk the list and add items as we find them, but it is much
-  // easier to build the list and then filter the results.
-  PasswordFormList all_forms;
-  if (!GetAllLogins(&all_forms))
-    return false;
-
-  forms->reserve(forms->size() + all_forms.size());
-  for (size_t i = 0; i < all_forms.size(); ++i) {
-    if (get_begin <= all_forms[i]->date_created &&
-        (get_end.is_null() || all_forms[i]->date_created < get_end)) {
-      forms->push_back(all_forms[i]);
-    } else {
-      delete all_forms[i];
-    }
-  }
-
-  return true;
+  return GetLoginsBetween(get_begin, get_end, CREATION_TIMESTAMP, forms);
 }
 
 bool NativeBackendGnome::GetAutofillableLogins(PasswordFormList* forms) {
@@ -753,6 +727,61 @@ bool NativeBackendGnome::GetAllLogins(PasswordFormList* forms) {
   return true;
 }
 
+bool NativeBackendGnome::GetLoginsBetween(base::Time get_begin,
+                                          base::Time get_end,
+                                          TimestampToCompare date_to_compare,
+                                          PasswordFormList* forms) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
+  // We could walk the list and add items as we find them, but it is much
+  // easier to build the list and then filter the results.
+  PasswordFormList all_forms;
+  if (!GetAllLogins(&all_forms))
+    return false;
+
+  base::Time autofill::PasswordForm::*date_member =
+      date_to_compare == CREATION_TIMESTAMP
+          ? &autofill::PasswordForm::date_created
+          : &autofill::PasswordForm::date_synced;
+  for (size_t i = 0; i < all_forms.size(); ++i) {
+    if (get_begin <= all_forms[i]->*date_member &&
+        (get_end.is_null() || all_forms[i]->*date_member < get_end)) {
+      forms->push_back(all_forms[i]);
+    } else {
+      delete all_forms[i];
+    }
+  }
+
+  return true;
+}
+
+bool NativeBackendGnome::RemoveLoginsBetween(
+    base::Time get_begin,
+    base::Time get_end,
+    TimestampToCompare date_to_compare,
+    password_manager::PasswordStoreChangeList* changes) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
+  if (changes)
+    changes->clear();
+  // We could walk the list and delete items as we find them, but it is much
+  // easier to build the list and use RemoveLogin() to delete them.
+  ScopedVector<autofill::PasswordForm> forms;
+  if (!GetLoginsBetween(get_begin, get_end, date_to_compare, &forms.get()))
+    return false;
+
+  bool ok = true;
+  for (size_t i = 0; i < forms.size(); ++i) {
+    if (RemoveLogin(*forms[i])) {
+      if (changes) {
+        changes->push_back(password_manager::PasswordStoreChange(
+            password_manager::PasswordStoreChange::REMOVE, *forms[i]));
+      }
+    } else {
+      ok = false;
+    }
+  }
+  return ok;
+}
+
 std::string NativeBackendGnome::GetProfileSpecificAppString() const {
   // Originally, the application string was always just "chrome" and used only
   // so that we had *something* to search for since GNOME Keyring won't search
diff --git a/chrome/browser/password_manager/native_backend_gnome_x.h b/chrome/browser/password_manager/native_backend_gnome_x.h
index c5d2c2e..67d84a5 100644
--- a/chrome/browser/password_manager/native_backend_gnome_x.h
+++ b/chrome/browser/password_manager/native_backend_gnome_x.h
@@ -87,17 +87,26 @@ class NativeBackendGnome : public PasswordStoreX::NativeBackend,
       const autofill::PasswordForm& form,
       password_manager::PasswordStoreChangeList* changes) OVERRIDE;
   virtual bool RemoveLogin(const autofill::PasswordForm& form) OVERRIDE;
-  virtual bool RemoveLoginsCreatedBetween(
-      const base::Time& delete_begin, const base::Time& delete_end) OVERRIDE;
+  virtual bool RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                          base::Time delete_end) OVERRIDE;
+  virtual bool RemoveLoginsSyncedBetween(
+      base::Time delete_begin,
+      base::Time delete_end,
+      password_manager::PasswordStoreChangeList* changes) OVERRIDE;
   virtual bool GetLogins(const autofill::PasswordForm& form,
                          PasswordFormList* forms) OVERRIDE;
-  virtual bool GetLoginsCreatedBetween(const base::Time& get_begin,
-                                       const base::Time& get_end,
+  virtual bool GetLoginsCreatedBetween(base::Time get_begin,
+                                       base::Time get_end,
                                        PasswordFormList* forms) OVERRIDE;
   virtual bool GetAutofillableLogins(PasswordFormList* forms) OVERRIDE;
   virtual bool GetBlacklistLogins(PasswordFormList* forms) OVERRIDE;
 
  private:
+  enum TimestampToCompare {
+    CREATION_TIMESTAMP,
+    SYNC_TIMESTAMP,
+  };
+
   // Adds a login form without checking for one to replace first.
   bool RawAddLogin(const autofill::PasswordForm& form);
 
@@ -107,6 +116,20 @@ class NativeBackendGnome : public PasswordStoreX::NativeBackend,
   // Helper for GetLoginsCreatedBetween().
   bool GetAllLogins(PasswordFormList* forms);
 
+  // Retrieves password created/synced in the time interval. Returns |true| if
+  // the operation succeeded.
+  bool GetLoginsBetween(base::Time get_begin,
+                        base::Time get_end,
+                        TimestampToCompare date_to_compare,
+                        PasswordFormList* forms);
+
+  // Removes password created/synced in the time interval. Returns |true| if the
+  // operation succeeded. |changes| will contain the changes applied.
+  bool RemoveLoginsBetween(base::Time get_begin,
+                           base::Time get_end,
+                           TimestampToCompare date_to_compare,
+                           password_manager::PasswordStoreChangeList* changes);
+
   // Generates a profile-specific app string based on profile_id_.
   std::string GetProfileSpecificAppString() const;
 
diff --git a/chrome/browser/password_manager/native_backend_gnome_x_unittest.cc b/chrome/browser/password_manager/native_backend_gnome_x_unittest.cc
index cf8f2214..fb045ca 100644
--- a/chrome/browser/password_manager/native_backend_gnome_x_unittest.cc
+++ b/chrome/browser/password_manager/native_backend_gnome_x_unittest.cc
@@ -309,6 +309,13 @@ void CheckPasswordChanges(const PasswordStoreChangeList& expected_list,
   }
 }
 
+void CheckPasswordChangesWithResult(const PasswordStoreChangeList* expected,
+                                    const PasswordStoreChangeList* actual,
+                                    bool result) {
+  EXPECT_TRUE(result);
+  CheckPasswordChanges(*expected, *actual);
+}
+
 }  // anonymous namespace
 
 class NativeBackendGnomeTest : public testing::Test {
@@ -948,4 +955,65 @@ TEST_F(NativeBackendGnomeTest, ListLoginsAppends) {
     CheckMockKeyringItem(&mock_keyring_items[0], form_google_, "chrome-42");
 }
 
+TEST_F(NativeBackendGnomeTest, RemoveLoginsSyncedBetween) {
+  NativeBackendGnome backend(42);
+  backend.Init();
+
+  base::Time now = base::Time::Now();
+  base::Time next_day = now + base::TimeDelta::FromDays(1);
+  form_google_.date_synced = now;
+  form_isc_.date_synced = next_day;
+  form_google_.date_created = base::Time();
+  form_isc_.date_created = base::Time();
+
+  BrowserThread::PostTask(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(base::IgnoreResult(&NativeBackendGnome::AddLogin),
+                 base::Unretained(&backend),
+                 form_google_));
+  BrowserThread::PostTask(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(base::IgnoreResult(&NativeBackendGnome::AddLogin),
+                 base::Unretained(&backend),
+                 form_isc_));
+
+  PasswordStoreChangeList expected_changes;
+  expected_changes.push_back(
+      PasswordStoreChange(PasswordStoreChange::REMOVE, form_google_));
+  PasswordStoreChangeList changes;
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(&NativeBackendGnome::RemoveLoginsSyncedBetween,
+                 base::Unretained(&backend),
+                 base::Time(),
+                 next_day,
+                 &changes),
+      base::Bind(&CheckPasswordChangesWithResult, &expected_changes, &changes));
+  RunBothThreads();
+
+  EXPECT_EQ(1u, mock_keyring_items.size());
+  if (mock_keyring_items.size() > 0)
+    CheckMockKeyringItem(&mock_keyring_items[0], form_isc_, "chrome-42");
+
+  // Remove form_isc_.
+  expected_changes.clear();
+  expected_changes.push_back(
+      PasswordStoreChange(PasswordStoreChange::REMOVE, form_isc_));
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(&NativeBackendGnome::RemoveLoginsSyncedBetween,
+                 base::Unretained(&backend),
+                 next_day,
+                 base::Time(),
+                 &changes),
+      base::Bind(&CheckPasswordChangesWithResult, &expected_changes, &changes));
+  RunBothThreads();
+
+  EXPECT_EQ(0u, mock_keyring_items.size());
+}
+
 // TODO(mdm): add more basic tests here at some point.
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x.cc b/chrome/browser/password_manager/native_backend_kwallet_x.cc
index d8816e5..e493d0d 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x.cc
+++ b/chrome/browser/password_manager/native_backend_kwallet_x.cc
@@ -356,94 +356,18 @@ bool NativeBackendKWallet::RemoveLogin(const PasswordForm& form) {
   return ok;
 }
 
-bool NativeBackendKWallet::RemoveLoginsCreatedBetween(
-    const base::Time& delete_begin,
-    const base::Time& delete_end) {
-  int wallet_handle = WalletHandle();
-  if (wallet_handle == kInvalidKWalletHandle)
-    return false;
-
-  // We could probably also use readEntryList here.
-  std::vector<std::string> realm_list;
-  {
-    dbus::MethodCall method_call(kKWalletInterface, "entryList");
-    dbus::MessageWriter builder(&method_call);
-    builder.AppendInt32(wallet_handle);  // handle
-    builder.AppendString(folder_name_);  // folder
-    builder.AppendString(app_name_);     // appid
-    scoped_ptr<dbus::Response> response(
-        kwallet_proxy_->CallMethodAndBlock(
-            &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
-    if (!response.get()) {
-      LOG(ERROR) << "Error contacting kwalletd (entryList)";
-      return false;
-    }
-    dbus::MessageReader reader(response.get());
-    dbus::MessageReader array(response.get());
-    if (!reader.PopArray(&array)) {
-      LOG(ERROR) << "Error reading response from kwalletd (entryList): "
-                 << response->ToString();
-      return false;
-    }
-    while (array.HasMoreData()) {
-      std::string realm;
-      if (!array.PopString(&realm)) {
-        LOG(ERROR) << "Error reading response from kwalletd (entryList): "
-                   << response->ToString();
-        return false;
-      }
-      realm_list.push_back(realm);
-    }
-  }
-
-  bool ok = true;
-  for (size_t i = 0; i < realm_list.size(); ++i) {
-    const std::string& signon_realm = realm_list[i];
-    dbus::MethodCall method_call(kKWalletInterface, "readEntry");
-    dbus::MessageWriter builder(&method_call);
-    builder.AppendInt32(wallet_handle);  // handle
-    builder.AppendString(folder_name_);  // folder
-    builder.AppendString(signon_realm);  // key
-    builder.AppendString(app_name_);     // appid
-    scoped_ptr<dbus::Response> response(
-        kwallet_proxy_->CallMethodAndBlock(
-            &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
-    if (!response.get()) {
-      LOG(ERROR) << "Error contacting kwalletd (readEntry)";
-      continue;
-    }
-    dbus::MessageReader reader(response.get());
-    const uint8_t* bytes = NULL;
-    size_t length = 0;
-    if (!reader.PopArrayOfBytes(&bytes, &length)) {
-      LOG(ERROR) << "Error reading response from kwalletd (readEntry): "
-                 << response->ToString();
-      continue;
-    }
-    if (!bytes || !CheckSerializedValue(bytes, length, signon_realm))
-      continue;
-
-    // Can't we all just agree on whether bytes are signed or not? Please?
-    Pickle pickle(reinterpret_cast<const char*>(bytes), length);
-    PasswordFormList all_forms;
-    DeserializeValue(signon_realm, pickle, &all_forms);
-
-    PasswordFormList kept_forms;
-    kept_forms.reserve(all_forms.size());
-    for (size_t i = 0; i < all_forms.size(); ++i) {
-      if (delete_begin <= all_forms[i]->date_created &&
-          (delete_end.is_null() || all_forms[i]->date_created < delete_end)) {
-        delete all_forms[i];
-      } else {
-        kept_forms.push_back(all_forms[i]);
-      }
-    }
+bool NativeBackendKWallet::RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                                      base::Time delete_end) {
+  password_manager::PasswordStoreChangeList changes;
+  return RemoveLoginsBetween(
+      delete_begin, delete_end, CREATION_TIMESTAMP, &changes);
+}
 
-    if (!SetLoginsList(kept_forms, signon_realm, wallet_handle))
-      ok = false;
-    STLDeleteElements(&kept_forms);
-  }
-  return ok;
+bool NativeBackendKWallet::RemoveLoginsSyncedBetween(
+    base::Time delete_begin,
+    base::Time delete_end,
+    password_manager::PasswordStoreChangeList* changes) {
+  return RemoveLoginsBetween(delete_begin, delete_end, SYNC_TIMESTAMP, changes);
 }
 
 bool NativeBackendKWallet::GetLogins(const PasswordForm& form,
@@ -454,13 +378,14 @@ bool NativeBackendKWallet::GetLogins(const PasswordForm& form,
   return GetLoginsList(forms, form.signon_realm, wallet_handle);
 }
 
-bool NativeBackendKWallet::GetLoginsCreatedBetween(const base::Time& get_begin,
-                                                   const base::Time& get_end,
+bool NativeBackendKWallet::GetLoginsCreatedBetween(base::Time get_begin,
+                                                   base::Time get_end,
                                                    PasswordFormList* forms) {
   int wallet_handle = WalletHandle();
   if (wallet_handle == kInvalidKWalletHandle)
     return false;
-  return GetLoginsList(forms, get_begin, get_end, wallet_handle);
+  return GetLoginsList(
+      forms, get_begin, get_end, wallet_handle, CREATION_TIMESTAMP);
 }
 
 bool NativeBackendKWallet::GetAutofillableLogins(PasswordFormList* forms) {
@@ -571,16 +496,21 @@ bool NativeBackendKWallet::GetLoginsList(PasswordFormList* forms,
 bool NativeBackendKWallet::GetLoginsList(PasswordFormList* forms,
                                          const base::Time& begin,
                                          const base::Time& end,
-                                         int wallet_handle) {
+                                         int wallet_handle,
+                                         TimestampToCompare date_to_compare) {
   PasswordFormList all_forms;
   if (!GetAllLogins(&all_forms, wallet_handle))
     return false;
 
   // We have to read all the entries, and then filter them here.
+  base::Time autofill::PasswordForm::*date_member =
+      date_to_compare == CREATION_TIMESTAMP
+          ? &autofill::PasswordForm::date_created
+          : &autofill::PasswordForm::date_synced;
   forms->reserve(forms->size() + all_forms.size());
   for (size_t i = 0; i < all_forms.size(); ++i) {
-    if (begin <= all_forms[i]->date_created &&
-        (end.is_null() || all_forms[i]->date_created < end)) {
+    if (begin <= all_forms[i]->*date_member &&
+        (end.is_null() || all_forms[i]->*date_member < end)) {
       forms->push_back(all_forms[i]);
     } else {
       delete all_forms[i];
@@ -709,6 +639,106 @@ bool NativeBackendKWallet::SetLoginsList(const PasswordFormList& forms,
   return ret == 0;
 }
 
+bool NativeBackendKWallet::RemoveLoginsBetween(
+    base::Time delete_begin,
+    base::Time delete_end,
+    TimestampToCompare date_to_compare,
+    password_manager::PasswordStoreChangeList* changes) {
+  DCHECK(changes);
+  changes->clear();
+  int wallet_handle = WalletHandle();
+  if (wallet_handle == kInvalidKWalletHandle)
+    return false;
+
+  // We could probably also use readEntryList here.
+  std::vector<std::string> realm_list;
+  {
+    dbus::MethodCall method_call(kKWalletInterface, "entryList");
+    dbus::MessageWriter builder(&method_call);
+    builder.AppendInt32(wallet_handle);  // handle
+    builder.AppendString(folder_name_);  // folder
+    builder.AppendString(app_name_);     // appid
+    scoped_ptr<dbus::Response> response(kwallet_proxy_->CallMethodAndBlock(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
+    if (!response.get()) {
+      LOG(ERROR) << "Error contacting kwalletd (entryList)";
+      return false;
+    }
+    dbus::MessageReader reader(response.get());
+    dbus::MessageReader array(response.get());
+    if (!reader.PopArray(&array)) {
+      LOG(ERROR) << "Error reading response from kwalletd (entryList): "
+                 << response->ToString();
+      return false;
+    }
+    while (array.HasMoreData()) {
+      std::string realm;
+      if (!array.PopString(&realm)) {
+        LOG(ERROR) << "Error reading response from kwalletd (entryList): "
+                   << response->ToString();
+        return false;
+      }
+      realm_list.push_back(realm);
+    }
+  }
+
+  bool ok = true;
+  for (size_t i = 0; i < realm_list.size(); ++i) {
+    const std::string& signon_realm = realm_list[i];
+    dbus::MethodCall method_call(kKWalletInterface, "readEntry");
+    dbus::MessageWriter builder(&method_call);
+    builder.AppendInt32(wallet_handle);  // handle
+    builder.AppendString(folder_name_);  // folder
+    builder.AppendString(signon_realm);  // key
+    builder.AppendString(app_name_);     // appid
+    scoped_ptr<dbus::Response> response(kwallet_proxy_->CallMethodAndBlock(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
+    if (!response.get()) {
+      LOG(ERROR) << "Error contacting kwalletd (readEntry)";
+      continue;
+    }
+    dbus::MessageReader reader(response.get());
+    const uint8_t* bytes = NULL;
+    size_t length = 0;
+    if (!reader.PopArrayOfBytes(&bytes, &length)) {
+      LOG(ERROR) << "Error reading response from kwalletd (readEntry): "
+                 << response->ToString();
+      continue;
+    }
+    if (!bytes || !CheckSerializedValue(bytes, length, signon_realm))
+      continue;
+
+    // Can't we all just agree on whether bytes are signed or not? Please?
+    Pickle pickle(reinterpret_cast<const char*>(bytes), length);
+    PasswordFormList all_forms;
+    DeserializeValue(signon_realm, pickle, &all_forms);
+
+    PasswordFormList kept_forms;
+    kept_forms.reserve(all_forms.size());
+    base::Time autofill::PasswordForm::*date_member =
+        date_to_compare == CREATION_TIMESTAMP
+            ? &autofill::PasswordForm::date_created
+            : &autofill::PasswordForm::date_synced;
+    for (size_t i = 0; i < all_forms.size(); ++i) {
+      if (delete_begin <= all_forms[i]->*date_member &&
+          (delete_end.is_null() || all_forms[i]->*date_member < delete_end)) {
+        changes->push_back(password_manager::PasswordStoreChange(
+            password_manager::PasswordStoreChange::REMOVE, *all_forms[i]));
+        delete all_forms[i];
+      } else {
+        kept_forms.push_back(all_forms[i]);
+      }
+    }
+
+    if (!SetLoginsList(kept_forms, signon_realm, wallet_handle)) {
+      ok = false;
+      changes->clear();
+    }
+    STLDeleteElements(&kept_forms);
+  }
+  return ok;
+}
+
 // static
 void NativeBackendKWallet::SerializeValue(const PasswordFormList& forms,
                                           Pickle* pickle) {
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x.h b/chrome/browser/password_manager/native_backend_kwallet_x.h
index 2567ba0e..4e7f689 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x.h
+++ b/chrome/browser/password_manager/native_backend_kwallet_x.h
@@ -46,12 +46,16 @@ class NativeBackendKWallet : public PasswordStoreX::NativeBackend {
       const autofill::PasswordForm& form,
       password_manager::PasswordStoreChangeList* changes) OVERRIDE;
   virtual bool RemoveLogin(const autofill::PasswordForm& form) OVERRIDE;
-  virtual bool RemoveLoginsCreatedBetween(
-      const base::Time& delete_begin, const base::Time& delete_end) OVERRIDE;
+  virtual bool RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                          base::Time delete_end) OVERRIDE;
+  virtual bool RemoveLoginsSyncedBetween(
+      base::Time delete_begin,
+      base::Time delete_end,
+      password_manager::PasswordStoreChangeList* changes) OVERRIDE;
   virtual bool GetLogins(const autofill::PasswordForm& form,
                          PasswordFormList* forms) OVERRIDE;
-  virtual bool GetLoginsCreatedBetween(const base::Time& get_begin,
-                                       const base::Time& get_end,
+  virtual bool GetLoginsCreatedBetween(base::Time get_begin,
+                                       base::Time get_end,
                                        PasswordFormList* forms) OVERRIDE;
   virtual bool GetAutofillableLogins(PasswordFormList* forms) OVERRIDE;
   virtual bool GetBlacklistLogins(PasswordFormList* forms) OVERRIDE;
@@ -75,6 +79,11 @@ class NativeBackendKWallet : public PasswordStoreX::NativeBackend {
     PERMANENT_FAIL   // Init failed, and is not likely to work later either.
   };
 
+  enum TimestampToCompare {
+    CREATION_TIMESTAMP,
+    SYNC_TIMESTAMP,
+  };
+
   // Initialization.
   bool StartKWalletd();
   InitResult InitWallet();
@@ -92,11 +101,12 @@ class NativeBackendKWallet : public PasswordStoreX::NativeBackend {
                      bool autofillable,
                      int wallet_handle);
 
-  // Reads PasswordForms from the wallet created in the given time range.
+  // Reads PasswordForms from the wallet created/synced in the given time range.
   bool GetLoginsList(PasswordFormList* forms,
                      const base::Time& begin,
                      const base::Time& end,
-                     int wallet_handle);
+                     int wallet_handle,
+                     TimestampToCompare date_to_compare);
 
   // Helper for some of the above GetLoginsList() methods.
   bool GetAllLogins(PasswordFormList* forms, int wallet_handle);
@@ -108,6 +118,13 @@ class NativeBackendKWallet : public PasswordStoreX::NativeBackend {
                      const std::string& signon_realm,
                      int wallet_handle);
 
+  // Removes password created/synced in the time interval. Returns |true| if the
+  // operation succeeded. |changes| will contain the changes applied.
+  bool RemoveLoginsBetween(base::Time delete_begin,
+                           base::Time delete_end,
+                           TimestampToCompare date_to_compare,
+                           password_manager::PasswordStoreChangeList* changes);
+
   // Opens the wallet and ensures that the "Chrome Form Data" folder exists.
   // Returns kInvalidWalletHandle on error.
   int WalletHandle();
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x_unittest.cc b/chrome/browser/password_manager/native_backend_kwallet_x_unittest.cc
index 63db11b..1f1713d 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x_unittest.cc
+++ b/chrome/browser/password_manager/native_backend_kwallet_x_unittest.cc
@@ -171,12 +171,17 @@ class NativeBackendKWalletTestBase : public testing::Test {
                                 const PasswordForm& actual);
   static void CheckPasswordChanges(const PasswordStoreChangeList& expected,
                                    const PasswordStoreChangeList& actual);
+  static void CheckPasswordChangesWithResult(
+      const PasswordStoreChangeList* expected,
+      const PasswordStoreChangeList* actual,
+      bool result);
 
   PasswordForm old_form_google_;
   PasswordForm form_google_;
   PasswordForm form_isc_;
 };
 
+// static
 void NativeBackendKWalletTestBase::CheckPasswordForm(
     const PasswordForm& expected, const PasswordForm& actual) {
   EXPECT_EQ(expected.origin, actual.origin);
@@ -197,6 +202,7 @@ void NativeBackendKWalletTestBase::CheckPasswordForm(
   EXPECT_EQ(expected.date_synced, actual.date_synced);
 }
 
+// static
 void NativeBackendKWalletTestBase::CheckPasswordChanges(
     const PasswordStoreChangeList& expected,
     const PasswordStoreChangeList& actual) {
@@ -207,6 +213,15 @@ void NativeBackendKWalletTestBase::CheckPasswordChanges(
   }
 }
 
+// static
+void NativeBackendKWalletTestBase::CheckPasswordChangesWithResult(
+    const PasswordStoreChangeList* expected,
+    const PasswordStoreChangeList* actual,
+    bool result) {
+  EXPECT_TRUE(result);
+  CheckPasswordChanges(*expected, *actual);
+}
+
 class NativeBackendKWalletTest : public NativeBackendKWalletTestBase {
  protected:
   NativeBackendKWalletTest()
@@ -792,6 +807,73 @@ TEST_F(NativeBackendKWalletTest, ListLoginsAppends) {
   CheckPasswordForms("Chrome Form Data (42)", expected);
 }
 
+TEST_F(NativeBackendKWalletTest, RemoveLoginsSyncedBetween) {
+  NativeBackendKWalletStub backend(42);
+  EXPECT_TRUE(backend.InitWithBus(mock_session_bus_));
+
+  base::Time now = base::Time::Now();
+  base::Time next_day = now + base::TimeDelta::FromDays(1);
+  form_google_.date_synced = now;
+  form_isc_.date_synced = next_day;
+  form_google_.date_created = base::Time();
+  form_isc_.date_created = base::Time();
+
+  BrowserThread::PostTask(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(base::IgnoreResult(&NativeBackendKWalletStub::AddLogin),
+                 base::Unretained(&backend),
+                 form_google_));
+  BrowserThread::PostTask(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(base::IgnoreResult(&NativeBackendKWalletStub::AddLogin),
+                 base::Unretained(&backend),
+                 form_isc_));
+
+  PasswordStoreChangeList expected_changes;
+  expected_changes.push_back(
+      PasswordStoreChange(PasswordStoreChange::REMOVE, form_google_));
+  PasswordStoreChangeList changes;
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(&NativeBackendKWalletStub::RemoveLoginsSyncedBetween,
+                 base::Unretained(&backend),
+                 base::Time(),
+                 next_day,
+                 &changes),
+      base::Bind(&NativeBackendKWalletTest::CheckPasswordChangesWithResult,
+                 &expected_changes,
+                 &changes));
+  RunDBThread();
+
+  std::vector<const PasswordForm*> forms;
+  forms.push_back(&form_isc_);
+  ExpectationArray expected;
+  expected.push_back(make_pair(std::string(form_isc_.signon_realm), forms));
+  CheckPasswordForms("Chrome Form Data (42)", expected);
+
+  // Remove form_isc_.
+  expected_changes.clear();
+  expected_changes.push_back(
+      PasswordStoreChange(PasswordStoreChange::REMOVE, form_isc_));
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::DB,
+      FROM_HERE,
+      base::Bind(&NativeBackendKWalletStub::RemoveLoginsSyncedBetween,
+                 base::Unretained(&backend),
+                 next_day,
+                 base::Time(),
+                 &changes),
+      base::Bind(&NativeBackendKWalletTest::CheckPasswordChangesWithResult,
+                 &expected_changes,
+                 &changes));
+  RunDBThread();
+
+  CheckPasswordForms("Chrome Form Data (42)", ExpectationArray());
+}
+
 // TODO(mdm): add more basic tests here at some point.
 // (For example tests for storing >1 password per realm pickle.)
 
diff --git a/chrome/browser/password_manager/password_store_mac.cc b/chrome/browser/password_manager/password_store_mac.cc
index c46c5d8..0c006db 100644
--- a/chrome/browser/password_manager/password_store_mac.cc
+++ b/chrome/browser/password_manager/password_store_mac.cc
@@ -965,6 +965,40 @@ PasswordStoreChangeList PasswordStoreMac::RemoveLoginsCreatedBetweenImpl(
   return changes;
 }
 
+PasswordStoreChangeList PasswordStoreMac::RemoveLoginsSyncedBetweenImpl(
+    base::Time delete_begin,
+    base::Time delete_end) {
+  PasswordStoreChangeList changes;
+  std::vector<PasswordForm*> forms;
+  if (login_metadata_db_->GetLoginsSyncedBetween(
+          delete_begin, delete_end, &forms)) {
+    if (login_metadata_db_->RemoveLoginsSyncedBetween(delete_begin,
+                                                      delete_end)) {
+      // We can't delete from the Keychain by date because we may be sharing
+      // items with database entries that weren't in the delete range. Instead,
+      // we find all the Keychain items we own but aren't using any more and
+      // delete those.
+      std::vector<PasswordForm*> orphan_keychain_forms =
+          GetUnusedKeychainForms();
+      // This is inefficient, since we have to re-look-up each keychain item
+      // one at a time to delete it even though the search step already had a
+      // list of Keychain item references. If this turns out to be noticeably
+      // slow we'll need to rearchitect to allow the search and deletion steps
+      // to share.
+      RemoveKeychainForms(orphan_keychain_forms);
+      STLDeleteElements(&orphan_keychain_forms);
+
+      for (std::vector<PasswordForm*>::const_iterator it = forms.begin();
+           it != forms.end();
+           ++it) {
+        changes.push_back(
+            PasswordStoreChange(PasswordStoreChange::REMOVE, **it));
+      }
+    }
+  }
+  return changes;
+}
+
 void PasswordStoreMac::GetLoginsImpl(
     const autofill::PasswordForm& form,
     AuthorizationPromptPolicy prompt_policy,
diff --git a/chrome/browser/password_manager/password_store_mac.h b/chrome/browser/password_manager/password_store_mac.h
index 87cc61b..fd1d4be 100644
--- a/chrome/browser/password_manager/password_store_mac.h
+++ b/chrome/browser/password_manager/password_store_mac.h
@@ -60,6 +60,9 @@ class PasswordStoreMac : public password_manager::PasswordStore {
   virtual password_manager::PasswordStoreChangeList
       RemoveLoginsCreatedBetweenImpl(const base::Time& delete_begin,
                                      const base::Time& delete_end) OVERRIDE;
+  virtual password_manager::PasswordStoreChangeList
+      RemoveLoginsSyncedBetweenImpl(base::Time delete_begin,
+                                    base::Time delete_end) OVERRIDE;
   virtual void GetLoginsImpl(
       const autofill::PasswordForm& form,
       AuthorizationPromptPolicy prompt_policy,
diff --git a/chrome/browser/password_manager/password_store_x.cc b/chrome/browser/password_manager/password_store_x.cc
index 8a6fc74..2fbe63c 100644
--- a/chrome/browser/password_manager/password_store_x.cc
+++ b/chrome/browser/password_manager/password_store_x.cc
@@ -110,6 +110,21 @@ PasswordStoreChangeList PasswordStoreX::RemoveLoginsCreatedBetweenImpl(
   return changes;
 }
 
+PasswordStoreChangeList PasswordStoreX::RemoveLoginsSyncedBetweenImpl(
+    base::Time delete_begin,
+    base::Time delete_end) {
+  CheckMigration();
+  PasswordStoreChangeList changes;
+  if (use_native_backend() &&
+      backend_->RemoveLoginsSyncedBetween(delete_begin, delete_end, &changes)) {
+    allow_fallback_ = false;
+  } else if (allow_default_store()) {
+    changes = PasswordStoreDefault::RemoveLoginsSyncedBetweenImpl(delete_begin,
+                                                                  delete_end);
+  }
+  return changes;
+}
+
 namespace {
 struct LoginLessThan {
   bool operator()(const PasswordForm* a, const PasswordForm* b) {
diff --git a/chrome/browser/password_manager/password_store_x.h b/chrome/browser/password_manager/password_store_x.h
index 585f64d..edc2c4e 100644
--- a/chrome/browser/password_manager/password_store_x.h
+++ b/chrome/browser/password_manager/password_store_x.h
@@ -46,12 +46,21 @@ class PasswordStoreX : public password_manager::PasswordStoreDefault {
         const autofill::PasswordForm& form,
         password_manager::PasswordStoreChangeList* changes) = 0;
     virtual bool RemoveLogin(const autofill::PasswordForm& form) = 0;
-    virtual bool RemoveLoginsCreatedBetween(const base::Time& delete_begin,
-                                            const base::Time& delete_end) = 0;
+
+    // Removes all logins created/synced from |delete_begin| onwards (inclusive)
+    // and before |delete_end|. You may use a null Time value to do an unbounded
+    // delete in either direction.
+    virtual bool RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                            base::Time delete_end) = 0;
+    virtual bool RemoveLoginsSyncedBetween(
+        base::Time delete_begin,
+        base::Time delete_end,
+        password_manager::PasswordStoreChangeList* changes) = 0;
+
     virtual bool GetLogins(const autofill::PasswordForm& form,
                            PasswordFormList* forms) = 0;
-    virtual bool GetLoginsCreatedBetween(const base::Time& get_begin,
-                                         const base::Time& get_end,
+    virtual bool GetLoginsCreatedBetween(base::Time get_begin,
+                                         base::Time get_end,
                                          PasswordFormList* forms) = 0;
     virtual bool GetAutofillableLogins(PasswordFormList* forms) = 0;
     virtual bool GetBlacklistLogins(PasswordFormList* forms) = 0;
@@ -79,6 +88,9 @@ class PasswordStoreX : public password_manager::PasswordStoreDefault {
   virtual password_manager::PasswordStoreChangeList
       RemoveLoginsCreatedBetweenImpl(const base::Time& delete_begin,
                                      const base::Time& delete_end) OVERRIDE;
+  virtual password_manager::PasswordStoreChangeList
+      RemoveLoginsSyncedBetweenImpl(base::Time delete_begin,
+                                    base::Time delete_end) OVERRIDE;
   virtual void GetLoginsImpl(
       const autofill::PasswordForm& form,
       AuthorizationPromptPolicy prompt_policy,
diff --git a/chrome/browser/password_manager/password_store_x_unittest.cc b/chrome/browser/password_manager/password_store_x_unittest.cc
index 3882ba0..4a67b5d 100644
--- a/chrome/browser/password_manager/password_store_x_unittest.cc
+++ b/chrome/browser/password_manager/password_store_x_unittest.cc
@@ -68,9 +68,15 @@ class FailingBackend : public PasswordStoreX::NativeBackend {
   }
   virtual bool RemoveLogin(const PasswordForm& form) OVERRIDE { return false; }
 
-  virtual bool RemoveLoginsCreatedBetween(
-      const base::Time& delete_begin,
-      const base::Time& delete_end) OVERRIDE {
+  virtual bool RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                          base::Time delete_end) OVERRIDE {
+    return false;
+  }
+
+  virtual bool RemoveLoginsSyncedBetween(
+      base::Time delete_begin,
+      base::Time delete_end,
+      password_manager::PasswordStoreChangeList* changes) OVERRIDE {
     return false;
   }
 
@@ -79,8 +85,8 @@ class FailingBackend : public PasswordStoreX::NativeBackend {
     return false;
   }
 
-  virtual bool GetLoginsCreatedBetween(const base::Time& get_begin,
-                                       const base::Time& get_end,
+  virtual bool GetLoginsCreatedBetween(base::Time get_begin,
+                                       base::Time get_end,
                                        PasswordFormList* forms) OVERRIDE {
     return false;
   }
@@ -121,9 +127,8 @@ class MockBackend : public PasswordStoreX::NativeBackend {
     return true;
   }
 
-  virtual bool RemoveLoginsCreatedBetween(
-      const base::Time& delete_begin,
-      const base::Time& delete_end) OVERRIDE {
+  virtual bool RemoveLoginsCreatedBetween(base::Time delete_begin,
+                                          base::Time delete_end) OVERRIDE {
     for (size_t i = 0; i < all_forms_.size(); ++i) {
       if (delete_begin <= all_forms_[i].date_created &&
           (delete_end.is_null() || all_forms_[i].date_created < delete_end))
@@ -132,6 +137,22 @@ class MockBackend : public PasswordStoreX::NativeBackend {
     return true;
   }
 
+  virtual bool RemoveLoginsSyncedBetween(
+      base::Time delete_begin,
+      base::Time delete_end,
+      password_manager::PasswordStoreChangeList* changes) OVERRIDE {
+    DCHECK(changes);
+    for (size_t i = 0; i < all_forms_.size(); ++i) {
+      if (delete_begin <= all_forms_[i].date_synced &&
+          (delete_end.is_null() || all_forms_[i].date_synced < delete_end)) {
+        changes->push_back(password_manager::PasswordStoreChange(
+            password_manager::PasswordStoreChange::REMOVE, all_forms_[i]));
+        erase(i--);
+      }
+    }
+    return true;
+  }
+
   virtual bool GetLogins(const PasswordForm& form,
                          PasswordFormList* forms) OVERRIDE {
     for (size_t i = 0; i < all_forms_.size(); ++i)
@@ -140,8 +161,8 @@ class MockBackend : public PasswordStoreX::NativeBackend {
     return true;
   }
 
-  virtual bool GetLoginsCreatedBetween(const base::Time& get_begin,
-                                       const base::Time& get_end,
+  virtual bool GetLoginsCreatedBetween(base::Time get_begin,
+                                       base::Time get_end,
                                        PasswordFormList* forms) OVERRIDE {
     for (size_t i = 0; i < all_forms_.size(); ++i)
       if (get_begin <= all_forms_[i].date_created &&
diff --git a/chrome/browser/sync/test/integration/passwords_helper.cc b/chrome/browser/sync/test/integration/passwords_helper.cc
index 6a3fb0f..0dee0eb 100644
--- a/chrome/browser/sync/test/integration/passwords_helper.cc
+++ b/chrome/browser/sync/test/integration/passwords_helper.cc
@@ -64,6 +64,16 @@ class PasswordStoreConsumerHelper
   DISALLOW_COPY_AND_ASSIGN(PasswordStoreConsumerHelper);
 };
 
+// PasswordForm::date_synced is a local field. Therefore it may be different
+// across clients.
+void ClearSyncDateField(std::vector<PasswordForm>* forms) {
+  for (std::vector<PasswordForm>::iterator it = forms->begin();
+       it != forms->end();
+       ++it) {
+    it->date_synced = base::Time();
+  }
+}
+
 }  // namespace
 
 namespace passwords_helper {
@@ -137,6 +147,7 @@ bool ProfileContainsSamePasswordFormsAsVerifier(int index) {
   std::vector<PasswordForm> forms;
   GetLogins(GetVerifierPasswordStore(), verifier_forms);
   GetLogins(GetPasswordStore(index), forms);
+  ClearSyncDateField(&forms);
   bool result =
       password_manager::ContainsSamePasswordForms(verifier_forms, forms);
   if (!result) {
@@ -159,6 +170,8 @@ bool ProfilesContainSamePasswordForms(int index_a, int index_b) {
   std::vector<PasswordForm> forms_b;
   GetLogins(GetPasswordStore(index_a), forms_a);
   GetLogins(GetPasswordStore(index_b), forms_b);
+  ClearSyncDateField(&forms_a);
+  ClearSyncDateField(&forms_b);
   bool result = password_manager::ContainsSamePasswordForms(forms_a, forms_b);
   if (!result) {
     LOG(ERROR) << "Password forms in Profile" << index_a << ":";
diff --git a/components/password_manager/core/browser/login_database.cc b/components/password_manager/core/browser/login_database.cc
index 5bb071f..90526e2 100644
--- a/components/password_manager/core/browser/login_database.cc
+++ b/components/password_manager/core/browser/login_database.cc
@@ -354,19 +354,20 @@ PasswordStoreChangeList LoginDatabase::UpdateLogin(const PasswordForm& form) {
   // Replacement is necessary to deal with updating imported credentials. See
   // crbug.com/349138 for details.
   sql::Statement s(db_.GetCachedStatement(SQL_FROM_HERE,
-      "UPDATE OR REPLACE logins SET "
-      "action_url = ?, "
-      "password_value = ?, "
-      "ssl_valid = ?, "
-      "preferred = ?, "
-      "possible_usernames = ?, "
-      "times_used = ?, "
-      "submit_element = ? "
-      "WHERE origin_url = ? AND "
-      "username_element = ? AND "
-      "username_value = ? AND "
-      "password_element = ? AND "
-      "signon_realm = ?"));
+                                          "UPDATE OR REPLACE logins SET "
+                                          "action_url = ?, "
+                                          "password_value = ?, "
+                                          "ssl_valid = ?, "
+                                          "preferred = ?, "
+                                          "possible_usernames = ?, "
+                                          "times_used = ?, "
+                                          "submit_element = ?, "
+                                          "date_synced = ? "
+                                          "WHERE origin_url = ? AND "
+                                          "username_element = ? AND "
+                                          "username_value = ? AND "
+                                          "password_element = ? AND "
+                                          "signon_realm = ?"));
   s.BindString(0, form.action.spec());
   s.BindBlob(1, encrypted_password.data(),
              static_cast<int>(encrypted_password.length()));
@@ -376,12 +377,13 @@ PasswordStoreChangeList LoginDatabase::UpdateLogin(const PasswordForm& form) {
   s.BindBlob(4, pickle.data(), pickle.size());
   s.BindInt(5, form.times_used);
   s.BindString16(6, form.submit_element);
+  s.BindInt64(7, form.date_synced.ToInternalValue());
 
-  s.BindString(7, form.origin.spec());
-  s.BindString16(8, form.username_element);
-  s.BindString16(9, form.username_value);
-  s.BindString16(10, form.password_element);
-  s.BindString(11, form.signon_realm);
+  s.BindString(8, form.origin.spec());
+  s.BindString16(9, form.username_element);
+  s.BindString16(10, form.username_value);
+  s.BindString16(11, form.password_element);
+  s.BindString(12, form.signon_realm);
 
   if (!s.Run())
     return PasswordStoreChangeList();
@@ -425,6 +427,19 @@ bool LoginDatabase::RemoveLoginsCreatedBetween(const base::Time delete_begin,
   return s.Run();
 }
 
+bool LoginDatabase::RemoveLoginsSyncedBetween(base::Time delete_begin,
+                                              base::Time delete_end) {
+  sql::Statement s(db_.GetCachedStatement(
+      SQL_FROM_HERE,
+      "DELETE FROM logins WHERE date_synced >= ? AND date_synced < ?"));
+  s.BindInt64(0, delete_begin.ToInternalValue());
+  s.BindInt64(1,
+              delete_end.is_null() ? base::Time::Max().ToInternalValue()
+                                   : delete_end.ToInternalValue());
+
+  return s.Run();
+}
+
 LoginDatabase::EncryptionResult LoginDatabase::InitPasswordFormFromStatement(
     PasswordForm* form,
     sql::Statement& s) const {
@@ -603,6 +618,38 @@ bool LoginDatabase::GetLoginsCreatedBetween(
   return s.Succeeded();
 }
 
+bool LoginDatabase::GetLoginsSyncedBetween(
+    const base::Time begin,
+    const base::Time end,
+    std::vector<autofill::PasswordForm*>* forms) const {
+  DCHECK(forms);
+  sql::Statement s(db_.GetCachedStatement(
+      SQL_FROM_HERE,
+      "SELECT origin_url, action_url, username_element, username_value, "
+      "password_element, password_value, submit_element, signon_realm, "
+      "ssl_valid, preferred, date_created, blacklisted_by_user, "
+      "scheme, password_type, possible_usernames, times_used, form_data, "
+      "use_additional_auth, date_synced FROM logins "
+      "WHERE date_synced >= ? AND date_synced < ?"
+      "ORDER BY origin_url"));
+  s.BindInt64(0, begin.ToInternalValue());
+  s.BindInt64(1,
+              end.is_null() ? base::Time::Max().ToInternalValue()
+                            : end.ToInternalValue());
+
+  while (s.Step()) {
+    scoped_ptr<PasswordForm> new_form(new PasswordForm());
+    EncryptionResult result = InitPasswordFormFromStatement(new_form.get(), s);
+    if (result == ENCRYPTION_RESULT_SERVICE_FAILURE)
+      return false;
+    if (result == ENCRYPTION_RESULT_ITEM_FAILURE)
+      continue;
+    DCHECK(result == ENCRYPTION_RESULT_SUCCESS);
+    forms->push_back(new_form.release());
+  }
+  return s.Succeeded();
+}
+
 bool LoginDatabase::GetAutofillableLogins(
     std::vector<PasswordForm*>* forms) const {
   return GetAllLoginsWithBlacklistSetting(false, forms);
diff --git a/components/password_manager/core/browser/login_database.h b/components/password_manager/core/browser/login_database.h
index 8fcf846..bfcf495 100644
--- a/components/password_manager/core/browser/login_database.h
+++ b/components/password_manager/core/browser/login_database.h
@@ -54,6 +54,12 @@ class LoginDatabase {
   bool RemoveLoginsCreatedBetween(const base::Time delete_begin,
                                   const base::Time delete_end);
 
+  // Removes all logins synced from |delete_begin| onwards (inclusive) and
+  // before |delete_end|. You may use a null Time value to do an unbounded
+  // delete in either direction.
+  bool RemoveLoginsSyncedBetween(base::Time delete_begin,
+                                 base::Time delete_end);
+
   // Loads a list of matching password forms into the specified vector |forms|.
   // The list will contain all possibly relevant entries to the observed |form|,
   // including blacklisted matches.
@@ -64,8 +70,16 @@ class LoginDatabase {
   // You may use a null Time value to do an unbounded search in either
   // direction.
   bool GetLoginsCreatedBetween(
-      const base::Time begin,
-      const base::Time end,
+      base::Time begin,
+      base::Time end,
+      std::vector<autofill::PasswordForm*>* forms) const;
+
+  // Loads all logins synced from |begin| onwards (inclusive) and before |end|.
+  // You may use a null Time value to do an unbounded search in either
+  // direction.
+  bool GetLoginsSyncedBetween(
+      base::Time begin,
+      base::Time end,
       std::vector<autofill::PasswordForm*>* forms) const;
 
   // Loads the complete list of autofillable password forms (i.e., not blacklist
diff --git a/components/password_manager/core/browser/login_database_unittest.cc b/components/password_manager/core/browser/login_database_unittest.cc
index 8cef06e..b1093c9 100644
--- a/components/password_manager/core/browser/login_database_unittest.cc
+++ b/components/password_manager/core/browser/login_database_unittest.cc
@@ -577,9 +577,11 @@ TEST_F(LoginDatabaseTest, TestPublicSuffixDomainMatchingRegexp) {
   EXPECT_EQ(0U, result.size());
 }
 
-static bool AddTimestampedLogin(LoginDatabase* db, std::string url,
+static bool AddTimestampedLogin(LoginDatabase* db,
+                                std::string url,
                                 const std::string& unique_string,
-                                const base::Time& time) {
+                                const base::Time& time,
+                                bool date_is_creation) {
   // Example password form.
   PasswordForm form;
   form.origin = GURL(url + std::string("/LoginAuth"));
@@ -588,7 +590,10 @@ static bool AddTimestampedLogin(LoginDatabase* db, std::string url,
   form.password_element = ASCIIToUTF16(unique_string);
   form.submit_element = ASCIIToUTF16("signIn");
   form.signon_realm = url;
-  form.date_created = time;
+  if (date_is_creation)
+    form.date_created = time;
+  else
+    form.date_synced = time;
   return db->AddLogin(form) == AddChangeForForm(form);
 }
 
@@ -610,11 +615,11 @@ TEST_F(LoginDatabaseTest, ClearPrivateData_SavedPasswords) {
   base::TimeDelta one_day = base::TimeDelta::FromDays(1);
 
   // Create one with a 0 time.
-  EXPECT_TRUE(AddTimestampedLogin(&db_, "1", "foo1", base::Time()));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "1", "foo1", base::Time(), true));
   // Create one for now and +/- 1 day.
-  EXPECT_TRUE(AddTimestampedLogin(&db_, "2", "foo2", now - one_day));
-  EXPECT_TRUE(AddTimestampedLogin(&db_, "3", "foo3", now));
-  EXPECT_TRUE(AddTimestampedLogin(&db_, "4", "foo4", now + one_day));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "2", "foo2", now - one_day, true));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "3", "foo3", now, true));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "4", "foo4", now + one_day, true));
 
   // Verify inserts worked.
   EXPECT_TRUE(db_.GetAutofillableLogins(&result));
@@ -642,6 +647,49 @@ TEST_F(LoginDatabaseTest, ClearPrivateData_SavedPasswords) {
   EXPECT_EQ(0U, result.size());
 }
 
+TEST_F(LoginDatabaseTest, RemoveLoginsSyncedBetween) {
+  ScopedVector<autofill::PasswordForm> result;
+
+  base::Time now = base::Time::Now();
+  base::TimeDelta one_day = base::TimeDelta::FromDays(1);
+
+  // Create one with a 0 time.
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "1", "foo1", base::Time(), false));
+  // Create one for now and +/- 1 day.
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "2", "foo2", now - one_day, false));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "3", "foo3", now, false));
+  EXPECT_TRUE(AddTimestampedLogin(&db_, "4", "foo4", now + one_day, false));
+
+  // Verify inserts worked.
+  EXPECT_TRUE(db_.GetAutofillableLogins(&result.get()));
+  EXPECT_EQ(4U, result.size());
+  result.clear();
+
+  // Get everything from today's date and on.
+  EXPECT_TRUE(db_.GetLoginsSyncedBetween(now, base::Time(), &result.get()));
+  ASSERT_EQ(2U, result.size());
+  EXPECT_EQ("3", result[0]->signon_realm);
+  EXPECT_EQ("4", result[1]->signon_realm);
+  result.clear();
+
+  // Delete everything from today's date and on.
+  db_.RemoveLoginsSyncedBetween(now, base::Time());
+
+  // Should have deleted half of what we inserted.
+  EXPECT_TRUE(db_.GetAutofillableLogins(&result.get()));
+  ASSERT_EQ(2U, result.size());
+  EXPECT_EQ("1", result[0]->signon_realm);
+  EXPECT_EQ("2", result[1]->signon_realm);
+  result.clear();
+
+  // Delete with 0 date (should delete all).
+  db_.RemoveLoginsSyncedBetween(base::Time(), now);
+
+  // Verify nothing is left.
+  EXPECT_TRUE(db_.GetAutofillableLogins(&result.get()));
+  EXPECT_EQ(0U, result.size());
+}
+
 TEST_F(LoginDatabaseTest, BlacklistedLogins) {
   std::vector<PasswordForm*> result;
 
@@ -814,6 +862,7 @@ TEST_F(LoginDatabaseTest, UpdateOverlappingCredentials) {
 
   // Simulate the user changing their password.
   complete_form.password_value = ASCIIToUTF16("new_password");
+  complete_form.date_synced = base::Time::Now();
   EXPECT_EQ(UpdateChangeForForm(complete_form), db_.UpdateLogin(complete_form));
 
   // Both still exist now.
diff --git a/components/password_manager/core/browser/mock_password_store.h b/components/password_manager/core/browser/mock_password_store.h
index 8fc8794..0c5da0c 100644
--- a/components/password_manager/core/browser/mock_password_store.h
+++ b/components/password_manager/core/browser/mock_password_store.h
@@ -36,6 +36,8 @@ class MockPasswordStore : public PasswordStore {
                PasswordStoreChangeList(const autofill::PasswordForm&));
   MOCK_METHOD2(RemoveLoginsCreatedBetweenImpl,
                PasswordStoreChangeList(const base::Time&, const base::Time&));
+  MOCK_METHOD2(RemoveLoginsSyncedBetweenImpl,
+               PasswordStoreChangeList(base::Time, base::Time));
   MOCK_METHOD3(GetLoginsImpl,
                void(const autofill::PasswordForm& form,
                     PasswordStore::AuthorizationPromptPolicy prompt_policy,
diff --git a/components/password_manager/core/browser/password_store.cc b/components/password_manager/core/browser/password_store.cc
index 0dd5684..3af03003 100644
--- a/components/password_manager/core/browser/password_store.cc
+++ b/components/password_manager/core/browser/password_store.cc
@@ -112,6 +112,17 @@ void PasswordStore::RemoveLoginsCreatedBetween(const base::Time& delete_begin,
                             this, delete_begin, delete_end)));
 }
 
+void PasswordStore::RemoveLoginsSyncedBetween(base::Time delete_begin,
+                                              base::Time delete_end) {
+  ScheduleTask(
+      base::Bind(&PasswordStore::WrapModificationTask,
+                 this,
+                 base::Bind(&PasswordStore::RemoveLoginsSyncedBetweenImpl,
+                            this,
+                            delete_begin,
+                            delete_end)));
+}
+
 void PasswordStore::GetLogins(
     const PasswordForm& form,
     AuthorizationPromptPolicy prompt_policy,
diff --git a/components/password_manager/core/browser/password_store.h b/components/password_manager/core/browser/password_store.h
index 6bb063d..f4fd83e 100644
--- a/components/password_manager/core/browser/password_store.h
+++ b/components/password_manager/core/browser/password_store.h
@@ -142,6 +142,10 @@ class PasswordStore : protected PasswordStoreSync,
   virtual void RemoveLoginsCreatedBetween(const base::Time& delete_begin,
                                           const base::Time& delete_end);
 
+  // Removes all logins synced in the given date range.
+  virtual void RemoveLoginsSyncedBetween(base::Time delete_begin,
+                                         base::Time delete_end);
+
   // Searches for a matching PasswordForm, and notifies |consumer| on
   // completion. The request will be cancelled if the consumer is destroyed.
   // |prompt_policy| indicates whether it's permissible to prompt the user to
@@ -215,6 +219,11 @@ class PasswordStore : protected PasswordStoreSync,
   virtual PasswordStoreChangeList RemoveLoginsCreatedBetweenImpl(
       const base::Time& delete_begin, const base::Time& delete_end) = 0;
 
+  // Synchronous implementation to remove the given logins.
+  virtual PasswordStoreChangeList RemoveLoginsSyncedBetweenImpl(
+      base::Time delete_begin,
+      base::Time delete_end) = 0;
+
   typedef base::Callback<void(const std::vector<autofill::PasswordForm*>&)>
       ConsumerCallbackRunner;  // Owns all PasswordForms in the vector.
 
diff --git a/components/password_manager/core/browser/password_store_default.cc b/components/password_manager/core/browser/password_store_default.cc
index 92cab5a..b14e185 100644
--- a/components/password_manager/core/browser/password_store_default.cc
+++ b/components/password_manager/core/browser/password_store_default.cc
@@ -70,6 +70,25 @@ PasswordStoreChangeList PasswordStoreDefault::RemoveLoginsCreatedBetweenImpl(
   return changes;
 }
 
+PasswordStoreChangeList PasswordStoreDefault::RemoveLoginsSyncedBetweenImpl(
+    base::Time delete_begin,
+    base::Time delete_end) {
+  std::vector<PasswordForm*> forms;
+  PasswordStoreChangeList changes;
+  if (login_db_->GetLoginsSyncedBetween(delete_begin, delete_end, &forms)) {
+    if (login_db_->RemoveLoginsSyncedBetween(delete_begin, delete_end)) {
+      for (std::vector<PasswordForm*>::const_iterator it = forms.begin();
+           it != forms.end();
+           ++it) {
+        changes.push_back(
+            PasswordStoreChange(PasswordStoreChange::REMOVE, **it));
+      }
+    }
+  }
+  STLDeleteElements(&forms);
+  return changes;
+}
+
 void PasswordStoreDefault::GetLoginsImpl(
     const autofill::PasswordForm& form,
     AuthorizationPromptPolicy prompt_policy,
diff --git a/components/password_manager/core/browser/password_store_default.h b/components/password_manager/core/browser/password_store_default.h
index 766f38d..a2a14d4 100644
--- a/components/password_manager/core/browser/password_store_default.h
+++ b/components/password_manager/core/browser/password_store_default.h
@@ -36,6 +36,9 @@ class PasswordStoreDefault : public PasswordStore {
       const autofill::PasswordForm& form) OVERRIDE;
   virtual PasswordStoreChangeList RemoveLoginsCreatedBetweenImpl(
       const base::Time& delete_begin, const base::Time& delete_end) OVERRIDE;
+  virtual PasswordStoreChangeList RemoveLoginsSyncedBetweenImpl(
+      base::Time delete_begin,
+      base::Time delete_end) OVERRIDE;
   virtual void GetLoginsImpl(
       const autofill::PasswordForm& form,
       AuthorizationPromptPolicy prompt_policy,
diff --git a/components/password_manager/core/browser/password_syncable_service.cc b/components/password_manager/core/browser/password_syncable_service.cc
index 61d1d40..8cf3817 100644
--- a/components/password_manager/core/browser/password_syncable_service.cc
+++ b/components/password_manager/core/browser/password_syncable_service.cc
@@ -221,6 +221,7 @@ syncer::SyncError PasswordSyncableService::ProcessSyncChanges(
   ScopedVector<autofill::PasswordForm> new_sync_entries;
   ScopedVector<autofill::PasswordForm> updated_sync_entries;
   ScopedVector<autofill::PasswordForm> deleted_entries;
+  base::Time time_now = base::Time::Now();
 
   for (syncer::SyncChangeList::const_iterator it = change_list.begin();
        it != change_list.end();
@@ -231,10 +232,12 @@ syncer::SyncError PasswordSyncableService::ProcessSyncChanges(
                           form.get());
     switch (it->change_type()) {
       case syncer::SyncChange::ACTION_ADD: {
+        form->date_synced = time_now;
         new_sync_entries.push_back(form.release());
         break;
       }
       case syncer::SyncChange::ACTION_UPDATE: {
+        form->date_synced = time_now;
         updated_sync_entries.push_back(form.release());
         break;
       }
@@ -368,10 +371,12 @@ void PasswordSyncableService::CreateOrUpdateEntry(
   // Check whether the data from sync is already in the password store.
   PasswordEntryMap::iterator existing_local_entry_iter =
       umatched_data_from_password_db->find(tag);
+  base::Time time_now = base::Time::Now();
   if (existing_local_entry_iter == umatched_data_from_password_db->end()) {
     // The sync data is not in the password store, so we need to create it in
     // the password store. Add the entry to the new_entries list.
     scoped_ptr<autofill::PasswordForm> new_password(new autofill::PasswordForm);
+    new_password->date_synced = time_now;
     PasswordFromSpecifics(password_specifics, new_password.get());
     new_sync_entries->push_back(new_password.release());
   } else {
@@ -384,6 +389,7 @@ void PasswordSyncableService::CreateOrUpdateEntry(
       case IDENTICAL:
         break;
       case SYNC:
+        new_password->date_synced = time_now;
         updated_sync_entries->push_back(new_password.release());
         break;
       case LOCAL:
diff --git a/components/password_manager/core/browser/password_syncable_service_unittest.cc b/components/password_manager/core/browser/password_syncable_service_unittest.cc
index b64dcb4..684cfdc 100644
--- a/components/password_manager/core/browser/password_syncable_service_unittest.cc
+++ b/components/password_manager/core/browser/password_syncable_service_unittest.cc
@@ -82,6 +82,25 @@ SyncChange CreateSyncChange(const autofill::PasswordForm& password,
   return SyncChange(FROM_HERE, type, data);
 }
 
+class FormFinder {
+ public:
+  explicit FormFinder(const autofill::PasswordForm& form) : form_(form) {}
+  ~FormFinder() {}
+
+  bool operator()(const autofill::PasswordForm& form) const;
+
+ private:
+  const autofill::PasswordForm form_;
+};
+
+bool FormFinder::operator()(const autofill::PasswordForm& form) const {
+  return form.origin == form_.origin &&
+         form.username_element == form_.username_element &&
+         form.username_value == form_.username_value &&
+         form.password_element == form_.password_element &&
+         form.signon_realm == form_.signon_realm;
+}
+
 // A testable implementation of the |PasswordSyncableService| that mocks
 // out all interaction with the password database.
 class MockPasswordSyncableService : public PasswordSyncableService {
@@ -267,9 +286,15 @@ PasswordStoreChangeList PasswordStoreDataVerifier::VerifyChange(
     PasswordStoreChange::Type type,
     const autofill::PasswordForm& password,
     std::vector<autofill::PasswordForm>* password_list) {
-  std::vector<autofill::PasswordForm>::iterator it =
-      std::find(password_list->begin(), password_list->end(), password);
+  std::vector<autofill::PasswordForm>::iterator it = std::find_if(
+      password_list->begin(), password_list->end(), FormFinder(password));
   EXPECT_NE(password_list->end(), it);
+  PasswordsEqual(GetPasswordSpecifics(SyncDataFromPassword(*it)),
+                 GetPasswordSpecifics(SyncDataFromPassword(password)));
+  if (type != PasswordStoreChange::REMOVE) {
+    EXPECT_FALSE(password.date_synced.is_null()) << password.signon_realm;
+    EXPECT_FALSE(password.date_synced.is_max()) << password.signon_realm;
+  }
   password_list->erase(it);
   return PasswordStoreChangeList(1, PasswordStoreChange(type, password));
 }
diff --git a/components/password_manager/core/browser/test_password_store.cc b/components/password_manager/core/browser/test_password_store.cc
index 555eb70..3a524a8 100644
--- a/components/password_manager/core/browser/test_password_store.cc
+++ b/components/password_manager/core/browser/test_password_store.cc
@@ -111,6 +111,13 @@ PasswordStoreChangeList TestPasswordStore::RemoveLoginsCreatedBetweenImpl(
   return changes;
 }
 
+PasswordStoreChangeList TestPasswordStore::RemoveLoginsSyncedBetweenImpl(
+    base::Time begin,
+    base::Time end) {
+  PasswordStoreChangeList changes;
+  return changes;
+}
+
 bool TestPasswordStore::FillAutofillableLogins(
     std::vector<autofill::PasswordForm*>* forms) {
   return true;
diff --git a/components/password_manager/core/browser/test_password_store.h b/components/password_manager/core/browser/test_password_store.h
index fb0b477..de9fb20 100644
--- a/components/password_manager/core/browser/test_password_store.h
+++ b/components/password_manager/core/browser/test_password_store.h
@@ -61,6 +61,9 @@ class TestPasswordStore : public PasswordStore {
   virtual void ReportMetricsImpl() OVERRIDE {}
   virtual PasswordStoreChangeList RemoveLoginsCreatedBetweenImpl(
       const base::Time& begin, const base::Time& end) OVERRIDE;
+  virtual PasswordStoreChangeList RemoveLoginsSyncedBetweenImpl(
+      base::Time delete_begin,
+      base::Time delete_end) OVERRIDE;
   virtual void GetAutofillableLoginsImpl(
       PasswordStore::GetLoginsRequest* request) OVERRIDE {}
   virtual void GetBlacklistLoginsImpl(