Create DisableAppGroupAccess test hook

EGtests bundle don't have access to application groups.
Create a test hook to prevent app group access.

Bug: 855625
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I3c773f92edfdaafb9207d69a51ba6fdee823868b
Reviewed-on: https://chromium-review.googlesource.com/1113540Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570715}

ios/chrome/app/tests_fake_hook.mm

@@ -10,6 +10,9 @@
 
 namespace tests_hook {
 
+bool DisableAppGroupAccess() {
+  return false;
+}
 bool DisableContentSuggestions() {
   return false;
 }

ios/chrome/app/tests_hook.h

@@ -7,6 +7,11 @@
 
 namespace tests_hook {
 
+// Returns true if app group access should be disabled as tests don't have the
+// required entitlements.
+// This is used by internal code.
+bool DisableAppGroupAccess();
+
 // Returns true if ContentSuggestions should be disabled to allow other tests to
 // run unimpeded.
 bool DisableContentSuggestions();

ios/chrome/browser/ui/tab_grid/tab_grid_egtests_hook.mm

@@ -10,6 +10,10 @@
 
 namespace tests_hook {
 
+bool DisableAppGroupAccess() {
+  return true;
+}
+
 bool DisableContentSuggestions() {
   return true;
 }

ios/chrome/browser/ui/toolbar/adaptive/adaptive_toolbar_eg_tests_hook.mm

@@ -10,6 +10,10 @@
 
 namespace tests_hook {
 
+bool DisableAppGroupAccess() {
+  return true;
+}
+
 bool DisableContentSuggestions() {
   return true;
 }

ios/chrome/test/earl_grey/eg_tests_hook.mm

@@ -10,6 +10,10 @@
 
 namespace tests_hook {
 
+bool DisableAppGroupAccess() {
+  return true;
+}
+
 bool DisableContentSuggestions() {
   return true;
 }