Revert 272478 "Always define _HAS_EXCEPTIONS=0 on Windows"

Revert 272478 "Always define _HAS_EXCEPTIONS=0 on Windows"

Caused assertion failures in multiple test suites.

BUG=82385, 377008
> Always define _HAS_EXCEPTIONS=0 on Windows
> 
> Previously we would not define it in component builds because it didn't work with old versions of MSVC. These days it should work.
> 
> The macro is extra important for Clang, which doesn't currently support exceptions on Windows.
> 
> BUG=82385
> 
> Review URL: https://codereview.chromium.org/287193012

TBR=hans@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272610

[Ken Russell (switch to Gerrit), 2014-05-23 22:11:05]

Committed patchset #1 manually as r272610.

[hans, 2014-05-23 22:14:39]

On 2014/05/23 22:11:05, Ken Russell wrote:
> Committed patchset #1 manually as r272610.

Sorry about the breakage. Do you have a link to any build logs exposing the
assertion failures?

[hans, 2014-05-23 22:16:07]

On 2014/05/23 22:14:39, hans wrote:
> On 2014/05/23 22:11:05, Ken Russell wrote:
> > Committed patchset #1 manually as r272610.
> 
> Sorry about the breakage. Do you have a link to any build logs exposing the
> assertion failures?

Ah, just found crbug.com/377008.