Initialized pair_id variable to 0.

This variable was uninitialized and the compiler gave a warning (which
got converted into an error because we compile using -Werror) when
GetIDAndCountOfFormElement() and its children are inlined. This is
because there is a path in that function that returns true but leaves
the pair_id variable uninitialized (if s.Step() is 0).

Note that I am not a Chromium committer so you will have to commit
this.

Patch by asharif; http://codereview.chromium.org/6293011/

BUG=70144
TEST=no visible change


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71860 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/webdata/web_database.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -1202,6 +1202,7 @@ bool WebDatabase::GetIDAndCountOfFormElement(
   s.BindString16(0, element.name());
   s.BindString16(1, element.value());
 
+  *pair_id = 0;
   *count = 0;
 
   if (s.Step()) {

chrome/browser/webdata/web_database.h

@@ -183,7 +183,8 @@ class WebDatabase {
   bool AddToCountOfFormElement(int64 pair_id, int delta, bool* was_removed);
 
   // Gets the pair_id and count entries from name and value specified in
-  // |element|.  Sets *count to 0 if there is no such row in the table.
+  // |element|.  Sets *pair_id and *count to 0 if there is no such row in
+  // the table.
   bool GetIDAndCountOfFormElement(const webkit_glue::FormField& element,
                                   int64* pair_id,
                                   int* count);