Fix build break for chrome os.
Fix build break for chrome os.

Add #include <stdio.h> for fclose et al.
Without stdio.h, we got errors like:
In file included from /usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.cc:5:
/usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.h: In destructor 'virtual PipeReader::~PipeReader()':
/usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.h:33: error: 'fclose' was not declared in this scope
/usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.cc: In member function 'virtual std::string PipeReader::Read(uint32)':
/usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.cc:11: error: 'fopen' was not declared in this scope
/usr/local/google/home/ukai/chrome/src/chrome/browser/chromeos/pipe_reader.cc:12: error: 'fgets' was not declared in this scope
scons: *** [/usr/local/google/home/ukai/chrome/src/sconsbuild/Debug/obj/chrome/browser/chromeos/pipe_reader.o] Error 1

Review URL: http://codereview.chromium.org/199046

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@25693 0039d316-1c4b-4281-b951-d872f2087c98

adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,ropik/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,adobe/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium