Devtools: Add metrics for drawer views being shown

chrome/browser/devtools/devtools_ui_bindings.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/devtools/devtools_ui_bindings.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 58 matching lines @@
 
 namespace {
 
 static const char kFrontendHostId[] = "id";
 static const char kFrontendHostMethod[] = "method";
 static const char kFrontendHostParams[] = "params";
 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";
 static const char kRemotePageActionActivate[] = "activate";
 static const char kRemotePageActionClose[] = "close";
 
 // This constant should be in sync with
 // the constant at shell_devtools_frontend.cc.
 const size_t kMaxMessageChunkSize = IPC::Channel::kMaximumMessageSize / 4;
 
@@ skipping 823 matching lines @@
     // TODO(nick): Replace with chrome::bad_message::ReceivedBadMessage().
     frontend_host_->BadMessageRecieved();
     return;
   }
   // Each histogram name must follow a different code path in
   // order to UMA_HISTOGRAM_ENUMERATION work correctly.
   if (name == kDevToolsActionTakenHistogram)
     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();
 }
 
 void DevToolsUIBindings::SendJsonRequest(const DispatchCallback& callback,
                                          const std::string& browser_id,
                                          const std::string& url) {
   if (!android_bridge_) {
     callback.Run(nullptr);
     return;
@@ skipping 274 matching lines @@
     return;
   frontend_loaded_ = true;
 
   // Call delegate first - it seeds importants bit of information.
   delegate_->OnLoadCompleted();
 
   AddDevToolsExtensionsToClient();
   if (g_web_socket_api_channel)
     g_web_socket_api_channel->AttachedToBindings(this);
 }