Remove ChildProcess.HangRendererType.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 22a92be332c23f4fdaa77dca0b306f695a221bbb..6e6bd04d1809e2862f19fa9d9f0d2f7910e7cb44 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4836,8 +4836,7 @@ void WebContentsImpl::OnIgnoredUIEvent() {
 }
 
 void WebContentsImpl::RendererUnresponsive(
-    RenderWidgetHostImpl* render_widget_host,
-    RendererUnresponsiveType type) {
+    RenderWidgetHostImpl* render_widget_host) {
   for (auto& observer : observers_)
     observer.OnRendererUnresponsive(render_widget_host);
 
@@ -4848,17 +4847,11 @@ void WebContentsImpl::RendererUnresponsive(
   if (ShouldIgnoreUnresponsiveRenderer())
     return;
 
-  // Record histograms about the type of renderer hang.
-  UMA_HISTOGRAM_ENUMERATION(
-      "ChildProcess.HangRendererType", type,
-      RendererUnresponsiveType::RENDERER_UNRESPONSIVE_MAX);
-
   if (!GetRenderViewHost() || !GetRenderViewHost()->IsRenderViewLive())
     return;
 
   if (delegate_) {
     WebContentsUnresponsiveState unresponsive_state;
-    unresponsive_state.reason = type;
     unresponsive_state.outstanding_ack_count =
         render_widget_host->in_flight_event_count();
     unresponsive_state.outstanding_event_type =