Misc. cleanup found while mucking with search engines code:

sql/connection.h

 // 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.
 
 #ifndef SQL_CONNECTION_H_
 #define SQL_CONNECTION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 89 matching lines @@
   // value for SQLITE_MAX_PAGE_SIZE is 32768."
   void set_page_size(int page_size) { page_size_ = page_size; }
 
   // Sets the number of pages that will be cached in memory by sqlite. The
   // total cache size in bytes will be page_size * cache_size. This must be
   // called before Open() to have an effect.
   void set_cache_size(int cache_size) { cache_size_ = cache_size; }
 
   // Call to put the database in exclusive locking mode. There is no "back to
   // normal" flag because of some additional requirements sqlite puts on this
-  // transaition (requires another access to the DB) and because we don't
+  // transaction (requires another access to the DB) and because we don't
   // actually need it.
   //
   // Exclusive mode means that the database is not unlocked at the end of each
   // transaction, which means there may be less time spent initializing the
   // next transaction because it doesn't have to re-aquire locks.
   //
   // This must be called before Open() to have an effect.
   void set_exclusive_locking() { exclusive_locking_ = true; }
 
   // Call to cause Open() to restrict access permissions of the
@@ skipping 471 matching lines @@
 
   // Tag for auxiliary histograms.
   std::string histogram_tag_;
 
   DISALLOW_COPY_AND_ASSIGN(Connection);
 };
 
 }  // namespace sql
 
 #endif  // SQL_CONNECTION_H_