suppress unaddr error at content::NavigateToURL

tools/valgrind/drmemory/suppressions.txt

Index: tools/valgrind/drmemory/suppressions.txt
diff --git a/tools/valgrind/drmemory/suppressions.txt b/tools/valgrind/drmemory/suppressions.txt
index 6d0f210bc22a65a8592ccd05f0efd3bc38bc5304..1a9b9ee5ac795cdb25c5015843d971ab9beb86bb 100644
--- a/tools/valgrind/drmemory/suppressions.txt
+++ b/tools/valgrind/drmemory/suppressions.txt
@@ -750,3 +750,24 @@ drmemorylib.dll!replace_operator_delete
 *!content::ContentMainRunnerImpl::Run
 *!content::ContentMain
 *!content::LaunchTests
+
+UNADDRESSABLE ACCESS
+name=http://crbug.com/456131
+...
+*!content::NavigateToURL
+*!content::BrowserSideNavigationBrowserTest_BrowserInitiatedNavigations_Test::RunTestOnMainThread
+*!content::ContentBrowserTest::RunTestOnMainThreadLoop
+*!content::BrowserTestBase::ProxyRunTestOnMainThreadLoop
+*!content::ShellBrowserMainParts::PreMainMessageLoopRun
+*!content::BrowserMainLoop::PreMainMessageLoopRun
+*!base::internal::Invoker<>::Run
+*!content::StartupTaskRunner::RunAllTasksNow
+*!content::BrowserMainLoop::CreateStartupTasks
+*!content::BrowserMainRunnerImpl::Initialize
+*!ShellBrowserMain
+*!content::ShellMainDelegate::RunProcess
+*!content::RunNamedProcessTypeMain
+*!content::ContentMainRunnerImpl::Run
+*!content::ContentMain
+*!content::BrowserTestBase::SetUp
+*!content::ContentBrowserTest::SetUp