Exclude the HarfBuzz tests instead of suppressing them.

The out-of-bounds access leads to a test failure under DrMemory.

BUG=480650
TBR=eae@chromium.org

Review URL: https://codereview.chromium.org/1109533003

Cr-Commit-Position: refs/heads/master@{#326888}

tools/valgrind/drmemory/suppressions.txt

@@ -774,10 +774,3 @@ name=http://crbug.com/476586b
 *!cc::LayerTreeHost::BeginMainFrame
 *!cc::ThreadProxy::BeginMainFrame
 *!base::internal::InvokeHelper<>::MakeItSo
-
-UNADDRESSABLE ACCESS
-name=https://crbug.com/480650
-wtf.dll!WTF::String::make16BitFrom8BitSource
-blink_platform.dll!blink::normalizeCharacters
-blink_platform.dll!blink::HarfBuzzShaper::HarfBuzzShaper
-*!`anonymous namespace'::HarfBuzzShaperTest*

tools/valgrind/gtest_exclude/blink_platform_unittests.gtest_win32.txt

+# https://crbug.com/480650: fails
+HarfBuzzShaperTest.ResolveCandidateRunsLatin
+HarfBuzzShaperTest.ResolveCandidateRunsLeadingCommon