Merge 25141 - Fix issue 15261: Crash in history::TextDatabase::GetTextMatches...

Merge 25141 - Fix issue 15261: Crash in history::TextDatabase::GetTextMatches

The crash in history::TextDatabase::GetTextMatches is caused by unexpected result of tolower() in some locales such as tr_TR.UTF8. This CL fixes this issue by using following statement to replace tolower():

(ch>='A' && ch<='Z') ? (ch'A'+'a') : ch

which will always return expected result for ascii characters regardless of current locale.

BUG=15261
Crash in history::TextDatabase::GetTextMatches
TEST=none

Review URL: http://codereview.chromium.org/174387

TBR=suzhe@chromium.org


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=25202