Update delimiter used for subtype logging.

This change corrects the delimiter used for subtype logging from
previously used . to a correct i.

There are no functional changes included in this CL.

Bug: 1110104
Change-Id: Ie2b8b4b7fe764d85e5e936853a42bf8057b0e73d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2321512Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Ender 💬 = 🕐 (ping me for faster reviews) <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#792272}

components/omnibox/browser/autocomplete_controller.cc

@@ -197,7 +197,7 @@ void AppendAvailableAutocompletion(size_t type,
   std::ostringstream subtype_str;
   for (auto subtype : subtypes) {
     if (subtype_str.tellp() > 0)
-      subtype_str << '.';
+      subtype_str << 'i';
     subtype_str << subtype;
   }
 

components/omnibox/browser/autocomplete_provider_unittest.cc

@@ -881,25 +881,25 @@ TEST_F(AutocompleteProviderTest, UpdateAssistedQueryStats) {
     // properly handled and reported as the same suggestion type.
     AssistedQueryStatsTestData test_data[] = {
         {AutocompleteMatchType::SEARCH_SUGGEST,
-         "chrome.0.0i13.22.99j46i27.31l2j46i27.31.42j46i27.31",
+         "chrome.0.0i13i22i99j46i27i31l2j46i27i31i42j46i27i31",
          {22, 99, 13, 99}},
         // The next two matches should be detected as the same type, despite
         // repeated subtype match.
         {AutocompleteMatchType::SEARCH_SUGGEST_ENTITY,
-         "chrome.1.0i13.22.99j46i27.31l2j46i27.31.42j46i27.31",
+         "chrome.1.0i13i22i99j46i27i31l2j46i27i31i42j46i27i31",
          {27, 31}},
         {AutocompleteMatchType::SEARCH_SUGGEST_ENTITY,
-         "chrome.2.0i13.22.99j46i27.31l2j46i27.31.42j46i27.31",
+         "chrome.2.0i13i22i99j46i27i31l2j46i27i31i42j46i27i31",
          {27, 31, 27}},
         // This match should not be bundled together with previous two, because
         // it comes with additional subtype information (42).
         {AutocompleteMatchType::SEARCH_SUGGEST_ENTITY,
-         "chrome.3.0i13.22.99j46i27.31l2j46i27.31.42j46i27.31",
+         "chrome.3.0i13i22i99j46i27i31l2j46i27i31i42j46i27i31",
          {27, 31, 42}},
         // This match should not be bundled together with the group before,
         // because these items are not adjacent.
         {AutocompleteMatchType::SEARCH_SUGGEST_ENTITY,
-         "chrome.4.0i13.22.99j46i27.31l2j46i27.31.42j46i27.31",
+         "chrome.4.0i13i22i99j46i27i31l2j46i27i31i42j46i27i31",
          {27, 31}},
     };
     SCOPED_TRACE("Complex set of matches with repetitive subtypes");