Fix TestingAutomationProvider::SimulateAsanMemoryBug.

chrome/browser/automation/testing_automation_provider.cc

Index: chrome/browser/automation/testing_automation_provider.cc
diff --git a/chrome/browser/automation/testing_automation_provider.cc b/chrome/browser/automation/testing_automation_provider.cc
index d1d0a40f35399f63d268214915791577a7674c58..0d911f73b8675a67559c755ed336b825b1ca8945 100644
--- a/chrome/browser/automation/testing_automation_provider.cc
+++ b/chrome/browser/automation/testing_automation_provider.cc
@@ -5885,15 +5885,20 @@ void TestingAutomationProvider::RefreshPolicies(
 #endif
 }
 
-static int AccessArray(const int arr[], int index) {
+static int AccessArray(const volatile int arr[], int index) {
   return arr[index];
 }
 
 void TestingAutomationProvider::SimulateAsanMemoryBug(
     base::DictionaryValue* args, IPC::Message* reply_message) {
-  int testarray[41];
-  AccessArray(testarray, 42);
+  // This array is volatile not to let compiler optimize us out.
+  volatile int testarray[41];
+
+  // Send the reply while we can.
   AutomationJSONReply(this, reply_message).SendSuccess(NULL);
+
+  // Cause Address Sanitizer to abort this process.
+  AccessArray(testarray, 42);
 }
 
 void TestingAutomationProvider::GetIndicesFromTab(