Fix a trivial warning compiling basictypes.h
Fix a trivial warning compiling basictypes.h

Using Clang with -Werror balked at this unused parameter.
C++ lets you just omit the name in that case.

BUG= none
TEST= none

Review URL: http://codereview.chromium.org/7917011

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@101625 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,gavinp/chromium