[ios] Add SafeBrowsingProtectionLevel and SearchSuggestEnabled to experimenatal policies

Enabled the two poilcies above for manual test.

Change-Id: Ie81620966a25e1886ad3ed2a1dc5cfb4e5a3f8f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367644Reviewed-by: sebsg <sebsg@chromium.org>
Commit-Queue: sebsg <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800349}

ios/chrome/browser/flags/about_flags.mm

@@ -716,6 +716,8 @@ void AppendSwitchesFromExperimentalSettings(base::CommandLine* command_line) {
       base::SysUTF8ToNSString(policy::key::kDefaultSearchProviderName),
       base::SysUTF8ToNSString(policy::key::kDefaultSearchProviderSearchURL),
       base::SysUTF8ToNSString(policy::key::kPasswordManagerEnabled),
+      base::SysUTF8ToNSString(policy::key::kSafeBrowsingProtectionLevel),
+      base::SysUTF8ToNSString(policy::key::kSearchSuggestEnabled),
       base::SysUTF8ToNSString(policy::key::kTranslateEnabled)
     ];
 
@@ -745,6 +747,11 @@ void AppendSwitchesFromExperimentalSettings(base::CommandLine* command_line) {
       base::SysUTF8ToNSString(policy::key::kPasswordManagerEnabled) : @NO,
 
       base::SysUTF8ToNSString(policy::key::kTranslateEnabled) : @NO,
+
+      // 2 = Enhanced safe browsing protection
+      base::SysUTF8ToNSString(policy::key::kSafeBrowsingProtectionLevel) : @2,
+
+      base::SysUTF8ToNSString(policy::key::kSearchSuggestEnabled) : @YES,
     }];
   }