Devtools: Add metrics for drawer views being shown

chrome/browser/devtools/devtools_ui_bindings.cc

Index: chrome/browser/devtools/devtools_ui_bindings.cc
diff --git a/chrome/browser/devtools/devtools_ui_bindings.cc b/chrome/browser/devtools/devtools_ui_bindings.cc
index a86a9242593c9b2681312f36deabe313aced54df..352f27bb9c420e9f7d54872abd1ffce635a872e6 100644
--- a/chrome/browser/devtools/devtools_ui_bindings.cc
+++ b/chrome/browser/devtools/devtools_ui_bindings.cc
@@ -76,6 +76,7 @@ static const char kTitleFormat[] = "Developer Tools - %s";
 
 static const char kDevToolsActionTakenHistogram[] = "DevTools.ActionTaken";
 static const char kDevToolsPanelShownHistogram[] = "DevTools.PanelShown";
+static const char kDevtoolsDrawerShownHistogram[] = "DevTools.DrawerShown";
 
 static const char kRemotePageActionInspect[] = "inspect";
 static const char kRemotePageActionReload[] = "reload";
@@ -919,6 +920,8 @@ void DevToolsUIBindings::RecordEnumeratedHistogram(const std::string& name,
     UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value);
   else if (name == kDevToolsPanelShownHistogram)
     UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value);
+  else if (name == kDevtoolsDrawerShownHistogram)
+    UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value);
   else
     frontend_host_->BadMessageRecieved();
 }