Revert "dart2js: Refactoring, documentation, and a few bugfixes in Namer class."

Revert "dart2js: Refactoring, documentation, and a few bugfixes in Namer class."

I'm reverting this CL because it leaves so many bots red.

You should be able to create a branhc, revert this CL, upload, fix the problem, upload again and get a code review of the fixes without the reviewer needing to review the whole CL, just the delta.

These tests fail (many browser bots are red since they run the same test):

python tools/test.py -mrelease -cdart2js -rff --use-sdk --write-debug-log --write-test-outcome-log --clear_browser_cache --dart2js-batch -t60 html/custom_element_method_clash_test

python tools/test.py -mrelease -rdrt --use-sdk --write-debug-log --write-test-outcome-log --clear_browser_cache --checked -t240 try/web/incremental_compilation_update_test

TBR=asgerf@google.com

Committed: https://code.google.com/p/dart/source/detail?r=43739

[sra1, 2015-02-12 20:32:39]

sra@google.com changed reviewers:
+ asgerf@google.com

[sra1, 2015-02-12 20:34:01]

Committed patchset #1 (id:1) manually as 43739 (presubmit successful).

[sra1, 2015-02-12 20:39:39]

More tests that fail with original CL:

python tools/test.py -mrelease -cdart2analyzer -rnone --host-checked
--write-debug-log --write-test-outcome-log -t240
pkg/docgen/test/single_library_test

python tools/test.py -mrelease -cdart2js -rd8 --use-sdk --write-debug-log
--write-test-outcome-log --clear_browser_cache --checked --dart2js-batch
--host-checked -t1920 dart2js_extra/closure_capture2_test