[omnibox android] Prefer std::make_unique

And fix exception unsafe code.

Bug: 
Change-Id: Ie09069136196c7987b1838cb453f6babec767561
Reviewed-on: https://chromium-review.googlesource.com/803856Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Kevin Bailey <krb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520994}

chrome/browser/android/omnibox/autocomplete_controller_android.cc

@@ -10,7 +10,6 @@
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/feature_list.h"
-#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
@@ -91,7 +90,7 @@ class ZeroSuggestPrefetcher : public AutocompleteControllerDelegate {
 
 ZeroSuggestPrefetcher::ZeroSuggestPrefetcher(Profile* profile)
     : controller_(new AutocompleteController(
-          base::MakeUnique<ChromeAutocompleteProviderClient>(profile),
+          std::make_unique<ChromeAutocompleteProviderClient>(profile),
           this,
           AutocompleteProvider::TYPE_ZERO_SUGGEST)) {
   // Creating an arbitrary fake_request_source to avoid passing in an invalid
@@ -128,7 +127,7 @@ void ZeroSuggestPrefetcher::OnResultChanged(bool default_match_changed) {
 
 AutocompleteControllerAndroid::AutocompleteControllerAndroid(Profile* profile)
     : autocomplete_controller_(new AutocompleteController(
-          base::WrapUnique(new ChromeAutocompleteProviderClient(profile)),
+          std::make_unique<ChromeAutocompleteProviderClient>(profile),
           this,
           AutocompleteClassifier::DefaultOmniboxProviders())),
       inside_synchronous_start_(false),