Don't preload all tokens

Don't preload all tokens

Turns out we're not really ready to do this.
The preloader has lots of bugs at least in the
re-use-existing-preload logic. Yes, we should fix
these bugs. Yes, making all tokens go through the
preloader would force us to fix these bugs. But
until we do, it seems better to sweep them back
under the rug (and just have flakiness in the wild)
rather than making preloader bugs completely
unavoidable by forcing every token through it.

This is a partial revert of:
https://codereview.chromium.org/302063002/

BUG=356292, 388308, 389226
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=177044

[eseidel, 2014-06-26 18:26:34]

The only part I didn't revert was the ResourceFetcher changes (which fixed
actual bugs in the preloader).

[abarth-chromium, 2014-06-26 18:43:15]

LGTM

[eseidel, 2014-06-26 18:43:49]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-06-26 18:44:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/eseidel@chromium.org/359623004/1

[commit-bot: I haz the power, 2014-06-26 19:37:57]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/26379)

[commit-bot: I haz the power, 2014-06-26 20:09:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-26 20:09:19]

Try jobs failed on following builders:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/26379)

[eseidel, 2014-06-27 00:04:37]

Odd.  "gaia" error on win gpu:
FAILED: ninja -t msvc -e environment.x86 -- E:\b\build\goma/gomacc
"E:\b\depot_tools\win_toolchain\vs2013_files\VC\bin\amd64_x86\cl.exe" /nologo
/showIncludes /FC
@obj\google_apis\gaia\google_apis_test_support.fake_gaia.obj.rsp /c
..\..\google_apis\gaia\fake_gaia.cc
/Foobj\google_apis\gaia\google_apis_test_support.fake_gaia.obj
/Fdobj\google_apis\google_apis_test_support.cc.pdb 
e:\b\build\slave\win_gpu\build\src\google_apis\gaia\fake_gaia.cc(183) :error
C2039: 'people_get_url' : is not a member of 'GaiaUrls'
        e:\b\build\slave\win_gpu\build\src\google_apis\gaia\gaia_urls.h(14) :
see declaration of 'GaiaUrls'
e:\b\build\slave\win_gpu\build\src\google_apis\gaia\fake_gaia.cc(183) :error
C2228: left of '.path' must have class/struct/union
ninja: build stopped: subcommand failed.

[eseidel, 2014-06-27 00:04:43]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-06-27 00:05:54]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/eseidel@chromium.org/359623004/1

[commit-bot: I haz the power, 2014-06-27 02:22:45]

Change committed as 177044