[omnibox] Fix translation Pedal not always prompting; simplified!

This CL eliminates the state invalidation that was used to cause
translation prompt to show, as that did not work in all cases.
The translation step is changed so the prompt always shows, which
is much simpler.

Bug: 893183
Change-Id: I5dca3eb30032461fc8824a36c9a80a1a82f84cdc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354660Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Orin Jaworski <orinj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798137}

chrome/browser/ui/omnibox/chrome_omnibox_client.cc

@@ -401,15 +401,10 @@ void ChromeOmniboxClient::PromptPageTranslation() {
         ChromeTranslateClient::FromWebContents(contents);
     if (translate_client) {
       translate::LanguageState& state = translate_client->GetLanguageState();
-      const std::string original_language = state.original_language();
-      // Since the user is explicitly requesting the translation prompt, here
-      // we invalidate state that prevents prompt in some other circumstances.
-      state.SetTranslateEnabled(true);
-      state.LanguageDetermined("", true);
       // Here we pass triggered_from_menu as true because that is meant to
       // capture whether the user explicitly requested the translation.
       translate_client->ShowTranslateUI(
-          translate::TRANSLATE_STEP_BEFORE_TRANSLATE, original_language,
+          translate::TRANSLATE_STEP_TRANSLATING, state.original_language(),
           state.AutoTranslateTo(), translate::TranslateErrors::NONE,
           /*triggered_from_menu=*/true);
     }