Add Keyboard Latency UMA Metrics.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1213 matching lines @@
   if (popup_child_host_view_ && popup_child_host_view_->NeedsInputGrab()) {
     popup_child_host_view_->InsertChar(event);
     return;
   }
 
   // Ignore character messages for VKEY_RETURN sent on CTRL+M. crbug.com/315547
   // TODO(wjmaclean): can host_ ever be null?
   if (host_ && (event_handler_->accept_return_character() ||
                 event.GetCharacter() != ui::VKEY_RETURN)) {
     // Send a blink::WebInputEvent::Char event to |host_|.
-    ForwardKeyboardEvent(NativeWebKeyboardEvent(event, event.GetCharacter()),
-                         nullptr);
+    ForwardKeyboardEventWithLatencyInfo(
+        NativeWebKeyboardEvent(event, event.GetCharacter()), *event.latency(),
+        nullptr);
   }
 }
 
 ui::TextInputType RenderWidgetHostViewAura::GetTextInputType() const {
   if (text_input_manager_ && text_input_manager_->GetTextInputState())
     return text_input_manager_->GetTextInputState()->type;
   return ui::TEXT_INPUT_TYPE_NONE;
 }
 
 ui::TextInputMode RenderWidgetHostViewAura::GetTextInputMode() const {
@@ skipping 983 matching lines @@
 void RenderWidgetHostViewAura::DetachFromInputMethod() {
   ui::InputMethod* input_method = GetInputMethod();
   if (input_method) {
     input_method->DetachTextInputClient(this);
 #if defined(OS_CHROMEOS)
     wm::RestoreWindowBoundsOnClientFocusLost(window_->GetToplevelWindow());
 #endif  // defined(OS_CHROMEOS)
   }
 }
 
-void RenderWidgetHostViewAura::ForwardKeyboardEvent(
+void RenderWidgetHostViewAura::ForwardKeyboardEventWithLatencyInfo(
     const NativeWebKeyboardEvent& event,
+    const ui::LatencyInfo& latency,
     bool* update_event) {
   RenderWidgetHostImpl* target_host = host_;
 
   // If there are multiple widgets on the page (such as when there are
   // out-of-process iframes), pick the one that should process this event.
   if (host_->delegate())
     target_host = host_->delegate()->GetFocusedRenderWidgetHost(host_);
   if (!target_host)
     return;
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   ui::TextEditKeyBindingsDelegateAuraLinux* keybinding_delegate =
       ui::GetTextEditKeyBindingsDelegate();
   std::vector<ui::TextEditCommandAuraLinux> commands;
   if (!event.skip_in_browser &&
       keybinding_delegate &&
       event.os_event &&
       keybinding_delegate->MatchEvent(*event.os_event, &commands)) {
     // Transform from ui/ types to content/ types.
     EditCommands edit_commands;
     for (std::vector<ui::TextEditCommandAuraLinux>::const_iterator it =
              commands.begin(); it != commands.end(); ++it) {
       edit_commands.push_back(EditCommand(it->GetCommandString(),
                                           it->argument()));
     }
 
-    target_host->ForwardKeyboardEventWithCommands(event, &edit_commands,
-                                                  update_event);
+    target_host->ForwardKeyboardEventWithCommands(event, latency,
+                                                  &edit_commands, update_event);
     return;
   }
 #endif
 
-  target_host->ForwardKeyboardEventWithCommands(event, nullptr, update_event);
+  target_host->ForwardKeyboardEventWithCommands(event, latency, nullptr,
+                                                update_event);
 }
 
 void RenderWidgetHostViewAura::CreateSelectionController() {
   ui::TouchSelectionController::Config tsc_config;
   tsc_config.max_tap_duration = base::TimeDelta::FromMilliseconds(
       ui::GestureConfiguration::GetInstance()->long_press_time_in_ms());
   tsc_config.tap_slop = ui::GestureConfiguration::GetInstance()
                             ->max_touch_move_in_pixels_for_click();
   tsc_config.enable_longpress_drag_selection = false;
   selection_controller_.reset(new ui::TouchSelectionController(
@@ skipping 103 matching lines @@
 }
 
 void RenderWidgetHostViewAura::UpdateNeedsBeginFramesInternal() {
   if (!delegated_frame_host_)
     return;
   delegated_frame_host_->SetNeedsBeginFrames(needs_begin_frames_ ||
                                              needs_flush_input_);
 }
 
 }  // namespace content