Update from https://crrev.com/329939

build/sanitizers/lsan_suppressions.cc

Index: build/sanitizers/lsan_suppressions.cc
diff --git a/build/sanitizers/lsan_suppressions.cc b/build/sanitizers/lsan_suppressions.cc
index f9aae3ead3b0e884f2e6a9668d85ff041716e147..ac2defa11b7d82e445aaa3184fd13183400ef27e 100644
--- a/build/sanitizers/lsan_suppressions.cc
+++ b/build/sanitizers/lsan_suppressions.cc
@@ -59,7 +59,6 @@ char kLSanDefaultSuppressions[] =
 "leak:WTF::StringImpl::createUninitialized\n"
 "leak:WTF::StringImpl::create8BitIfPossible\n"
 "leak:blink::MouseEvent::create\n"
-"leak:blink::WindowProxy::initializeIfNeeded\n"
 "leak:blink::*::*GetterCallback\n"
 "leak:blink::CSSComputedStyleDeclaration::create\n"
 "leak:blink::V8PerIsolateData::ensureDomInJSContext\n"
@@ -69,6 +68,9 @@ char kLSanDefaultSuppressions[] =
 // This should really be RemoteDOMWindow::create, but symbolization is
 // weird in release builds. https://crbug.com/484760
 "leak:blink::RemoteFrame::create\n"
+// Likewise, this should really be blink::WindowProxy::initializeIfNeeded.
+// https://crbug.com/484760
+"leak:blink::WindowProxy::createContext\n"
 
 // http://crbug.com/356785
 "leak:content::RenderViewImplTest_DecideNavigationPolicyForWebUI_Test::TestBody\n"