Add the suggestions UI in chrome

ios/chrome/browser/experimental_flags.mm

 // 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.
 
 // This file can be empty. Its purpose is to contain the relatively short lived
 // definitions required for experimental flags.
 
 #include "ios/chrome/browser/experimental_flags.h"
 
 #include <dispatch/dispatch.h>
@@ skipping 291 matching lines @@
 bool UseOnlyLocalHeuristicsForPasswordGeneration() {
   if ([[NSUserDefaults standardUserDefaults]
           boolForKey:kHeuristicsForPasswordGeneration]) {
     return true;
   }
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(
       autofill::switches::kLocalHeuristicsOnlyForPasswordGeneration);
 }
 
+bool IsSuggestionsUIEnabled() {
+  // Check if the experimental flag is forced on or off.
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kEnableSuggestionsUI)) {

[marq (ping after 24h), 2017/01/19 16:32:31]

Is the usual pattern when both 'enable' and 'disable' flags are present to
enable? 

[gambard, 2017/01/19 17:50:12]

It is the one used in the other flags.

[marq (ping after 24h), 2017/01/20 12:34:46]

OK.

+    return true;
+  } else if (command_line->HasSwitch(switches::kDisableSuggestionsUI)) {

[marq (ping after 24h), 2017/01/19 16:32:31]

no 'else' after return; just

if ()
  return

if ()
  return

return

[gambard, 2017/01/19 17:50:11]

Done.

+    return false;
+  }
+
+  // By default, disable it.
+  return false;
+}
+
 }  // namespace experimental_flags