roll gyp 1096:1098
roll gyp 1096:1098

1097: Make dump_dependency_json work on Mac and possibly other OSs.
1098: make: Remove a few unused imports.

BUG=103273
TEST=none


Review URL: http://codereview.chromium.org/8662026

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@111466 0039d316-1c4b-4281-b951-d872f2087c98

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