Prune unused LSan suppressions.

BUG=270180, 262934, 323149, 318221
TBR=glider@chromium.org

Review URL: https://codereview.chromium.org/933623002

Cr-Original-Commit-Position: refs/heads/master@{#316485}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: c913fda63cec93527b7a4392c68976c965de83c1

sanitizers/lsan_suppressions.cc

@@ -25,12 +25,9 @@ char kLSanDefaultSuppressions[] =
 // Leaks in Nvidia's libGL.
 "leak:libGL.so\n"
 
-// A small string is leaked here (57 bytes per process). http://crbug.com/46571#c9
+// A small leak in V8. http://crbug.com/46571#c9
 "leak:blink::V8GCController::collectGarbage\n"
 
-// http://crbug.com/270180
-"leak:net::ProxyResolverV8::Context::ResolveProxy\n"
-
 // TODO(earthdok): revisit NSS suppressions after the switch to BoringSSL
 // NSS leaks in CertDatabaseNSSTest tests. http://crbug.com/51988
 "leak:net::NSSCertDatabase::ImportFromPKCS12\n"
@@ -51,15 +48,9 @@ char kLSanDefaultSuppressions[] =
 // XRandR has several one time leaks.
 "leak:libxrandr\n"
 
-// Skia leaks GrGpuGL::ProgramCache::Entry. http://crbug.com/262934
-"leak:GrGpuGL::flushGraphicsState\n"
-
 // xrandr leak. http://crbug.com/119677
 "leak:XRRFindDisplay\n"
 
-// V8 may leak this by design in unit tests. http://crbug.com/323149
-"leak:v8::internal::Genesis::Genesis\n"
-
 // Suppressions for objects which can be owned by the V8 heap. This is a
 // temporary workaround until LeakSanitizer supports the V8 heap.
 // Those should only fire in (browser)tests. If you see one of them in Chrome,
@@ -89,9 +80,6 @@ char kLSanDefaultSuppressions[] =
 // Small test-only leak in ppapi_unittests. http://crbug.com/258113
 "leak:ppapi::proxy::PPP_Instance_Private_ProxyTest_PPPInstancePrivate_Test\n"
 
-// http://crbug.com/318221
-"leak:base::EnsureProcessTerminated\n"
-
 // http://crbug.com/322671
 "leak:content::SpeechRecognitionBrowserTest::SetUpOnMainThread\n"