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

Review URL: https://codereview.chromium.org/289343004

git-svn-id: http://src.chromium.org/svn/trunk/src/build@272610 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -4851,7 +4851,6 @@
           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
           'WIN32_LEAN_AND_MEAN',
           '_ATL_NO_OPENGL',
-          '_HAS_EXCEPTIONS=0',
         ],
         'conditions': [
           ['buildtype=="Official"', {
@@ -4911,6 +4910,11 @@
               ],
             },
           ],
+          ['component=="static_library"', {
+            'defines': [
+              '_HAS_EXCEPTIONS=0',
+            ],
+          }],
           ['secure_atl', {
             'defines': [
               '_SECURE_ATL',