Remove Gmail password check from ShowInterstitial

Interstitials are only shown for GSUITE and enterprise passwords.

Bug: 1012084
Change-Id: I79dd08d39168d7fb034575915243f568a77d4622
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1845915
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Auto-Submit: Xinghui Lu <xinghuilu@chromium.org>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Bettina Dea <bdea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707200}

chrome/browser/safe_browsing/chrome_password_protection_service.cc

@@ -455,15 +455,13 @@ void ChromePasswordProtectionService::OnModalWarningShownForEnterprisePassword(
 void ChromePasswordProtectionService::ShowInterstitial(
     content::WebContents* web_contents,
     ReusedPasswordAccountType password_type) {
-  DCHECK(password_type.account_type() == ReusedPasswordAccountType::GMAIL ||
-         password_type.account_type() ==
+  DCHECK(password_type.account_type() ==
              ReusedPasswordAccountType::NON_GAIA_ENTERPRISE ||
          password_type.account_type() == ReusedPasswordAccountType::GSUITE);
   // Exit fullscreen if this |web_contents| is showing in fullscreen mode.
   if (web_contents->IsFullscreenForCurrentTab())
     web_contents->ExitFullscreen(/*will_cause_resize=*/true);
 
-  GURL trigger_url = web_contents->GetLastCommittedURL();
   content::OpenURLParams params(
       GURL(chrome::kChromeUIResetPasswordURL), content::Referrer(),
       WindowOpenDisposition::NEW_FOREGROUND_TAB, ui::PAGE_TRANSITION_LINK,