Decouple iOS from chrome/app/chrome_command_ids.h.
Decouple iOS from chrome/app/chrome_command_ids.h.

None of the //chrome files built for the production app use an IDC_
constant, so duplicate values of the constants used in ios_internal
(as the comment say thay may be used in NIB files) and port code to
use ios/chrome/browser/ui/commands/ios_command_ids.h instead.

BUG=None

Review URL: https://codereview.chromium.org/1558823002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#367525}

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