Modify sql unittests to pass on iOS.

sql/connection_unittest.cc

 // Copyright (c) 2012 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 "base/file_util.h"
 #include "base/scoped_temp_dir.h"
 #include "sql/connection.h"
 #include "sql/statement.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/sqlite/sqlite3.h"
@@ skipping 155 matching lines @@
   }
 
   {
     sql::Statement s(db().GetUniqueStatement("SELECT * FROM sqlite_master"));
     ASSERT_FALSE(s.Step());
   }
 }
 
 // Test that Raze() maintains page_size.
 TEST_F(SQLConnectionTest, RazePageSize) {
-  const int kPageSize = 4096;
-
-  // Make sure that the default size isn't already |kPageSize|.
+  // Fetch the default page size and double it for use in this test.
   // Scoped to release statement before Close().
+  int default_page_size = 0;
   {
     sql::Statement s(db().GetUniqueStatement("PRAGMA page_size"));
     ASSERT_TRUE(s.Step());
-    ASSERT_NE(kPageSize, s.ColumnInt(0));
+    default_page_size = s.ColumnInt(0);
   }
+  ASSERT_GT(default_page_size, 0);
+  const int kPageSize = 2 * default_page_size;
 
   // Re-open the database to allow setting the page size.
   db().Close();
   db().set_page_size(kPageSize);
   ASSERT_TRUE(db().Open(db_path()));
 
   // page_size should match the indicated value.
   sql::Statement s(db().GetUniqueStatement("PRAGMA page_size"));
   ASSERT_TRUE(s.Step());
   ASSERT_EQ(kPageSize, s.ColumnInt(0));
@@ skipping 59 matching lines @@
   ASSERT_FALSE(db().Raze());
 
   // Complete the statement unlocks the database.
   ASSERT_FALSE(s.Step());
   ASSERT_TRUE(db().Raze());
 }
 
 // TODO(shess): Spin up a background thread to hold other_db, to more
 // closely match real life.  That would also allow testing
 // RazeWithTimeout().