Track renderer crash detected on WebState via GlobalWebStateObserver

ios/chrome/browser/tabs/tab.mm

Index: ios/chrome/browser/tabs/tab.mm
diff --git a/ios/chrome/browser/tabs/tab.mm b/ios/chrome/browser/tabs/tab.mm
index b5e12d3765c2add415dff86d912e2a3beaf136a6..93283b9a9c17f6461d1f62f5987fc118966d0718 100644
--- a/ios/chrome/browser/tabs/tab.mm
+++ b/ios/chrome/browser/tabs/tab.mm
@@ -1904,11 +1904,6 @@ void TabInfoBarObserver::OnInfoBarReplaced(infobars::InfoBar* old_infobar,
 
 - (void)renderProcessGoneForWebState:(web::WebState*)webState {
   if (browserState_ && !browserState_->IsOffTheRecord()) {
-    // Report the crash.
-    GetApplicationContext()
-        ->GetMetricsServicesManager()
-        ->OnRendererProcessCrash();

[rohitrao (ping after 24h), 2017/03/26 23:26:23]

Is anyone else calling this OnRendererProcessCrash method?  Can we delete it?

[pkl (ping after 24h if needed), 2017/03/27 15:32:47]

I think it can be removed. Since it involves metrics_service_client.h, I'm going
to do it as a separate CL.

-
     // Log the tab state for the termination.
     RendererTerminationTabState tab_state =
         visible_ ? RendererTerminationTabState::FOREGROUND_TAB_FOREGROUND_APP