Add TRACE_EVENT markers to various keyboard functions

ui/keyboard/content/keyboard_ui_content.cc

 // Copyright (c) 2013 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 "ui/keyboard/content/keyboard_ui_content.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/values.h"
 #include "content/public/browser/render_widget_host.h"
@@ skipping 222 matching lines @@
 
 void KeyboardUIContent::ReloadKeyboardIfNeeded() {
   DCHECK(keyboard_contents_);
   if (keyboard_contents_->GetURL() != GetVirtualKeyboardUrl()) {
     if (keyboard_contents_->GetURL().GetOrigin() !=
         GetVirtualKeyboardUrl().GetOrigin()) {
       // Sets keyboard window rectangle to 0 and close current page before
       // navigate to a keyboard in a different extension. This keeps the UX the
       // same as Android. Note we need to explicitly close current page as it
       // might try to resize keyboard window in javascript on a resize event.
+      TRACE_EVENT0("vk", "ReloadKeyboardIfNeeded");
       GetKeyboardWindow()->SetBounds(gfx::Rect());
       keyboard_contents_->ClosePage();
       keyboard_controller()->SetKeyboardMode(FULL_WIDTH);
     }
     LoadContents(GetVirtualKeyboardUrl());
   }
 }
 
 void KeyboardUIContent::InitInsets(const gfx::Rect& new_bounds) {
   // Adjust the height of the viewport for visible windows on the primary
@@ skipping 65 matching lines @@
 
 const aura::Window* KeyboardUIContent::GetKeyboardRootWindow() const {
   if (!keyboard_contents_) {
     return nullptr;
   }
   return keyboard_contents_->GetNativeView()->GetRootWindow();
 }
 
 void KeyboardUIContent::LoadContents(const GURL& url) {
   if (keyboard_contents_) {
+    TRACE_EVENT0("vk", "LoadContents");
     content::OpenURLParams params(url, content::Referrer(),
                                   WindowOpenDisposition::SINGLETON_TAB,
                                   ui::PAGE_TRANSITION_AUTO_TOPLEVEL, false);
     keyboard_contents_->OpenURL(params);
   }
 }
 
 const GURL& KeyboardUIContent::GetVirtualKeyboardUrl() {
   if (keyboard::IsInputViewEnabled()) {
     const GURL& override_url = GetOverrideContentUrl();
@@ skipping 11 matching lines @@
           keyboard_controller()->keyboard_visible());
 }
 
 void KeyboardUIContent::AddBoundsChangedObserver(aura::Window* window) {
   aura::Window* target_window = window ? window->GetToplevelWindow() : nullptr;
   if (target_window)
     window_bounds_observer_->AddObservedWindow(target_window);
 }
 
 }  // namespace keyboard