Fixes and enhancements...

Fixes and enhancements
* Configurable CHROME_BUILD_TYPE command line or external environment
  variable for selecting appropriate release_impl*.scons settings
  (_checksenabled, _coverage, _dom_stats, _official, _purify).
* Configurable CHROMIUM_BUILD command line or external environment
  variable for selecting appropriate chromium_build*.scons settings
  (_google_chrome).
* Configurable /INCREMENTAL linking via command line or external
  environment variable ($INCREMENTAL), through appropriate setting
  of an internal $CHROMIUM_INCREMENTAL_FLAGS construction variable.
* Full link of release builds by default.
* Alphabetize *.scons files in the mac_env.FilterOut() list.
* Explicitly set _checksenabled.scons link flags.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=6210

[tony, 2008-12-02 05:06:47]

LGTM

http://codereview.chromium.org/13039/diff/1/2
File build/SConscript.main (right):

http://codereview.chromium.org/13039/diff/1/2#newcode24
Line 24: ('CHROME_BUILD_TYPE', '', os.environ.get('CHROME_BUILD_TYPE', '')),
Can you add a comment describing each of these environment vars?

[sgk, 2008-12-02 07:35:48]

http://codereview.chromium.org/13039/diff/1/2
File build/SConscript.main (right):

http://codereview.chromium.org/13039/diff/1/2#newcode24
Line 24: ('CHROME_BUILD_TYPE', '', os.environ.get('CHROME_BUILD_TYPE', '')),
On 2008/12/02 05:06:48, tony wrote:
> Can you add a comment describing each of these environment vars?

Done.