Why: Simpler build code. If everybody includes it, it should be included automatically.
Why now: The webkit chromium builds need it be specified, since can't default to build/common.gypi.
What was done:
1. build/common.gypi's contents were moved to a new file build/gyp_chromium.gypi
2. tools/gyp/gyp_chromium was moved to build/gyp_chromium and made to automatically include build/gyp_chromium.gypi.
3. lots of gyp files were fixed to not refer to build/common.gypi any more.
4. o3d which also builds independently of chrome, was fixed to have a gyp_o3d that includes gyp_chromium.gypi too.
5. build/common.gypi was left empty, because there are some external projects that still refer to it.
Things that are left to do after this patch is in:
1. The following external files (in other repositories) need to stop include common.gypi
./third_party/hunspell/hunspell.gyp
./third_party/icu/icu.gyp
./v8/tools/gyp/v8.gyp
2. Once nobody refers to common.gypi anymore, delete common.gypi
-or-
Delete gyp_chromium.gypi and move its content back to common.gypi
Tested on mac, win and linux. On win, got a few unit tests errors on chrome bookmarks, which should not be related. I'm running again with clobber to verify.
Review URL: http://codereview.chromium.org/206006
git-svn-id: http://src.chromium.org/svn/trunk/src/build@26302 4ff67af0-8c30-449e-8e8b-ad334ec8d88c