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

Review URL: https://codereview.chromium.org/410613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284626 0039d316-1c4b-4281-b951-d872f2087c98

build/common.gypi

@@ -5138,8 +5138,6 @@
           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
           'WIN32_LEAN_AND_MEAN',
           '_ATL_NO_OPENGL',
-          # _HAS_EXCEPTIONS must match ExceptionHandling in msvs_settings.
-          '_HAS_EXCEPTIONS=0',
         ],
         'conditions': [
           ['buildtype=="Official"', {
@@ -5207,6 +5205,11 @@
               ],
             },
           ],
+          ['component=="static_library"', {
+            'defines': [
+              '_HAS_EXCEPTIONS=0',
+            ],
+          }],
           ['secure_atl', {
             'defines': [
               '_SECURE_ATL',
@@ -5289,8 +5292,13 @@
             'WarningLevel': '4',
             'WarnAsError': 'true',
             'DebugInformationFormat': '3',
-            # ExceptionHandling must match _HAS_EXCEPTIONS above.
-            'ExceptionHandling': '0',
+            'conditions': [
+              ['component=="shared_library"', {
+                'ExceptionHandling': '1',  # /EHsc
+              }, {
+                'ExceptionHandling': '0',
+              }],
+            ],
           },
           'VCLibrarianTool': {
             'AdditionalOptions': ['/ignore:4221'],