--- a/components/content_settings/core/browser/content_settings_registry.cc	2017-10-04 18:07:38.000000000 -0400
+++ b/components/content_settings/core/browser/content_settings_registry.cc	2017-10-09 23:16:32.253867943 -0400
@@ -119,7 +119,7 @@
   // WARNING: The string names of the permissions passed in below are used to
   // generate preference names and should never be changed!
 
-  Register(CONTENT_SETTINGS_TYPE_COOKIES, "cookies", CONTENT_SETTING_ALLOW,
+  Register(CONTENT_SETTINGS_TYPE_COOKIES, "cookies", CONTENT_SETTING_SESSION_ONLY,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
@@ -175,7 +175,7 @@
            ContentSettingsInfo::PERSISTENT);
 
   Register(CONTENT_SETTINGS_TYPE_GEOLOCATION, "geolocation",
-           CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
+           CONTENT_SETTING_BLOCK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
@@ -199,7 +199,7 @@
            ContentSettingsInfo::PERSISTENT);
 
   Register(CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC, "media-stream-mic",
-           CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
+           CONTENT_SETTING_BLOCK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
@@ -245,7 +245,7 @@
   // TODO(raymes): We're temporarily making midi sysex unsyncable while we roll
   // out the kPermissionDelegation feature. We may want to make it syncable
   // again sometime in the future. See https://crbug.com/879954 for details.
-  Register(CONTENT_SETTINGS_TYPE_MIDI_SYSEX, "midi-sysex", CONTENT_SETTING_ASK,
+  Register(CONTENT_SETTINGS_TYPE_MIDI_SYSEX, "midi-sysex", CONTENT_SETTING_BLOCK,
            WebsiteSettingsInfo::UNSYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
@@ -260,9 +260,9 @@
 // On Android, the default value is ALLOW. See https://crbug.com/854737 for
 // details. On ChromeOS the default value is still ASK.
 #if defined(OS_ANDROID)
-           CONTENT_SETTING_ALLOW,
+           CONTENT_SETTING_BLOCK,
 #else
-           CONTENT_SETTING_ASK,
+           CONTENT_SETTING_BLOCK,
 #endif  // defined(OS_ANDROID)
            WebsiteSettingsInfo::UNSYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
@@ -289,7 +289,7 @@
            ContentSettingsInfo::PERSISTENT);
 
   Register(CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC, "background-sync",
-           CONTENT_SETTING_ALLOW, WebsiteSettingsInfo::UNSYNCABLE,
+           CONTENT_SETTING_BLOCK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::SINGLE_ORIGIN_ONLY_SCOPE,
@@ -347,7 +347,7 @@
            ContentSettingsInfo::PERSISTENT);
 
   Register(CONTENT_SETTINGS_TYPE_BLUETOOTH_GUARD, "bluetooth-guard",
-           CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
+           CONTENT_SETTING_BLOCK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ASK, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::SINGLE_ORIGIN_ONLY_SCOPE,