Fix crash due to different Tab Delegate used

static_cast<TabWebContentsDelegateAndroid> maybe a problem if different
delegate got used. So using a different method to check for isCustomTab

Bug: 1117533
Change-Id: Ibf5fde78e77bfaa407538880c181c713e176cb0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363215Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Commit-Queue: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799885}

chrome/browser/subresource_redirect/https_image_compression_infobar_decider.cc

@@ -86,9 +86,9 @@ bool HttpsImageCompressionInfoBarDecider::CanShowInfoBar(
   if (!navigation_handle->GetURL().SchemeIs(url::kHttpsScheme))
     return false;
 #if defined(OS_ANDROID)
-  auto* delegate = static_cast<android::TabWebContentsDelegateAndroid*>(
-      navigation_handle->GetWebContents()->GetDelegate());
-  if (delegate->IsCustomTab())
+  auto* tab_android =
+      TabAndroid::FromWebContents(navigation_handle->GetWebContents());
+  if (!tab_android || tab_android->IsCustomTab())
     return false;
 #endif
   return true;