Revert of Disable exceptions on Windows also in the shared_library build

Revert of Disable exceptions on Windows also in the shared_library build (https://codereview.chromium.org/404853002/)

Reason for revert:
Speculative revert to try to fix chrome_elf_unittests on Win7 x64.
http://build.chromium.org/p/chromium.win/builders/Win%207%20Tests%20x64%20%282%29/builds/18370
  AddDllsFromRegistryToBlacklist
  LoadBlacklistedLibrary

I'll reland if that's not it.


Original issue's description:
> Disable exceptions on Windows also in the shared_library build
> 
> They were previously only disabled in static_library builds. This is believed
> to have been due to problems with old MSVC versions, but it should work now.
> 
> This change is relevant for Clang, which currently doesn't support exceptions
> on Windows.
> 
> Last time I attempted to do this, it broke some tests due to a debug assertion.
> Gtest had previously been catching the exception, but with exceptions disabled
> it crashed. Those tests were actually broken in static_library Debug builds
> too, but we don't seem to have bots for that. After Blink r176189, we no longer
> hit that debug assertion, so the tests now pass.
> 
> BUG=82385
> TEST=blink_platform_unittests --gtest_filter=DateTimeFormatTest.CommonPattern,
>      content_browsertests --gtest_filter=RenderViewImplTest.SetEditableSelectionAndComposition
>      webkit_unit_tests
> 
> R=thakis@chromium.org
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284519

TBR=maruel@chromium.org,thakis@chromium.org,hans@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=82385
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284626

[Kunihiko Sakamoto, 2014-07-22 04:30:01]

Created Revert of Disable exceptions on Windows also in the shared_library build

[commit-bot: I haz the power, 2014-07-22 04:30:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ksakamoto@chromium.org/410613002/1

[commit-bot: I haz the power, 2014-07-22 04:31:55]

Change committed as 284626