Reland "[iOS][Translate] Adds EarlGrey tests for the new translate infobar (part 2)"

This is a reland of e09772fe

The original CL was reverted because testInfobarAutoNeverTranslateMaxTries was
timing out. That test is disabled in this reland.

Original change's description:
> [iOS][Translate] Adds EarlGrey tests for the new translate infobar (part 2)
>
> Adds tests for:
>
> 1. Auto Always translate (incl. max tries)
> 2. Never translate language
> 3. Auto Never translate (incl. max tries)
> 4. Never translate site
>
>
> Bug: 910994
> Change-Id: Ice90d639afd1f48dbdace62f6da8932f7b78d185
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1521592
> Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
> Reviewed-by: anthonyvd <anthonyvd@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#642911}

Bug: 910994
Change-Id: I06bbc66da0066690884706787b8fad1a543c455e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1538708Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: anthonyvd <anthonyvd@chromium.org>
Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644815}

components/translate/core/browser/translate_infobar_delegate.cc

@@ -24,7 +24,6 @@
 #include "ui/base/l10n/l10n_util.h"
 
 namespace translate {
-namespace {
 // The number of times user should consecutively translate for "Always
 // Translate" to automatically trigger.
 const int kAutoAlwaysThreshold = 5;
@@ -35,7 +34,6 @@ const int kAutoNeverThreshold = 10;
 const int kMaxNumberOfAutoAlways = 2;
 // The maximum number of times "Never Translate" is automatically triggered.
 const int kMaxNumberOfAutoNever = 2;
-}  // namespace
 
 const base::Feature kTranslateCompactUI{"TranslateCompactUI",
                                         base::FEATURE_ENABLED_BY_DEFAULT};

components/translate/core/browser/translate_infobar_delegate.h

@@ -29,6 +29,17 @@ class InfoBarManager;
 
 namespace translate {
 
+// The number of times user should consecutively translate for "Always
+// Translate" to automatically trigger.
+extern const int kAutoAlwaysThreshold;
+// The number of times user should consecutively dismiss the translate infobar
+// for "Never Translate" to automatically trigger.
+extern const int kAutoNeverThreshold;
+// The maximum number of times "Always Translate" is automatically triggered.
+extern const int kMaxNumberOfAutoAlways;
+// The maximum number of times "Never Translate" is automatically triggered.
+extern const int kMaxNumberOfAutoNever;
+
 // Feature flag for "Translate Compact Infobar UI" project.
 extern const base::Feature kTranslateCompactUI;