Add an histogram to differentiate between hang types of the renderer

content/browser/devtools/devtools_manager_unittest.cc

Index: content/browser/devtools/devtools_manager_unittest.cc
diff --git a/content/browser/devtools/devtools_manager_unittest.cc b/content/browser/devtools/devtools_manager_unittest.cc
index 049993265fd98312d373e4e58ea03ae39394a51e..2461179ae87fb2fe1500ae83a2e26e17a8d170f0 100644
--- a/content/browser/devtools/devtools_manager_unittest.cc
+++ b/content/browser/devtools/devtools_manager_unittest.cc
@@ -145,7 +145,8 @@ TEST_F(DevToolsManagerTest, NoUnresponsiveDialogInInspectedContents) {
 
   // Start with a short timeout.
   inspected_rvh->GetWidget()->StartHangMonitorTimeout(
-      TimeDelta::FromMilliseconds(10));
+      TimeDelta::FromMilliseconds(10),
+      RenderWidgetHostDelegate::RENDERER_UNRESPONSIVE_UNKNOWN);
   // Wait long enough for first timeout and see if it fired.
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
@@ -157,7 +158,8 @@ TEST_F(DevToolsManagerTest, NoUnresponsiveDialogInInspectedContents) {
   client_host.Close();
   // Start with a short timeout.
   inspected_rvh->GetWidget()->StartHangMonitorTimeout(
-      TimeDelta::FromMilliseconds(10));
+      TimeDelta::FromMilliseconds(10),
+      RenderWidgetHostDelegate::RENDERER_UNRESPONSIVE_UNKNOWN);
   // Wait long enough for first timeout and see if it fired.
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),