Disable Instant Extended limit by default for Android.

This change effectively increases number of search results
on Android devices from default (3).

Bug: 964049
Change-Id: I46887f88e3f76801d24f7dfdf928397e6a3ae66f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132858Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#755543}

components/omnibox/common/omnibox_features.cc

@@ -199,7 +199,13 @@ const base::Feature kAutocompleteTitles{"OmniboxAutocompleteTitles",
 // Returns whether IsInstantExtendedAPIEnabled should be ignored when deciding
 // the number of Google-provided search suggestions.
 const base::Feature kOmniboxDisableInstantExtendedLimit{
-    "OmniboxDisableInstantExtendedLimit", base::FEATURE_DISABLED_BY_DEFAULT};
+  "OmniboxDisableInstantExtendedLimit",
+#if defined(OS_ANDROID)
+      base::FEATURE_ENABLED_BY_DEFAULT
+#else
+      base::FEATURE_DISABLED_BY_DEFAULT
+#endif
+};
 
 // Show the search engine logo in the omnibox on Android (desktop already does
 // this).