[code coverage] Add files to exclusion list to unblock a CL.

Similar fix to https://crrev.com/c/2056205 but adding the files to the
windows list too since that bot is failing now also for my CL.

Bug: 1051561
Change-Id: Ia13d9264a00ed935ff5bcbaba0760483c51aa50a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2057243Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Oliver Li <olivierli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741469}

build/toolchain/clang_code_coverage_wrapper.py

@@ -112,7 +112,13 @@ _COVERAGE_EXCLUSION_LIST_MAP = {
         '../../base/message_loop/message_pump_win.cc',
         '../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc',  #pylint: disable=line-too-long
     ],
-    'win': [],
+    'win': [
+        # TODO(crbug.com/1051561): angle_unittests affected by coverage.
+        '../../base/message_loop/message_pump_default.cc',
+        '../../base/message_loop/message_pump_libevent.cc',
+        '../../base/message_loop/message_pump_win.cc',
+        '../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc',  #pylint: disable=line-too-long
+    ],
 }
 
 # Map of force lists indexed by target OS.