[sql] WARN_UNUSED_RESULT on Execute().

chrome/browser/history/in_memory_database.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/history/in_memory_database.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
@@ skipping 11 matching lines @@
 bool InMemoryDatabase::InitDB() {
   // Set the database page size to 4K for better performance.
   db_.set_page_size(4096);
 
   if (!db_.OpenInMemory()) {
     NOTREACHED() << "Cannot open databse " << GetDB().GetErrorMessage();
     return false;
   }
 
   // No reason to leave data behind in memory when rows are removed.
-  db_.Execute("PRAGMA auto_vacuum=1");
+  ignore_result(db_.Execute("PRAGMA auto_vacuum=1"));
 
   // Ensure this is really an in-memory-only cache.
-  db_.Execute("PRAGMA temp_store=MEMORY");
+  ignore_result(db_.Execute("PRAGMA temp_store=MEMORY"));
 
   // Create the URL table, but leave it empty for now.
   if (!CreateURLTable(false)) {
     NOTREACHED() << "Unable to create table";
     db_.Close();
     return false;
   }
 
   // Create the keyword search terms table.
   if (!InitKeywordSearchTermsTable()) {
@@ skipping 102 matching lines @@
   CreateKeywordSearchTermsIndices();
 
   return true;
 }
 
 sql::Connection& InMemoryDatabase::GetDB() {
   return db_;
 }
 
 }  // namespace history