Add TRACE_EVENT markers to various keyboard functions

ui/keyboard/keyboard_layout_manager.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 "ui/keyboard/keyboard_layout_manager.h"
 
 #include "ui/compositor/layer_animator.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/keyboard/keyboard_controller.h"
@@ skipping 26 matching lines @@
   } else if (controller_->keyboard_mode() == FLOATING) {
     controller_->GetContainerWindow()->SetBounds(child->bounds());
     SetChildBoundsDirect(keyboard_, gfx::Rect(child->bounds().size()));
   }
 }
 
 void KeyboardLayoutManager::SetChildBounds(aura::Window* child,
                                            const gfx::Rect& requested_bounds) {
   DCHECK(child == keyboard_);
 
+  TRACE_EVENT0("vk", "KeyboardLayoutSetChildBounds");
+
   // Request to change the bounds of child window (AKA the virtual keyboard
   // window) should change the container window first. Then the child window is
   // resized and covers the container window. Note the child's bound is only set
   // in OnWindowResized.
   gfx::Rect new_bounds = requested_bounds;
   if (controller_->keyboard_mode() == FULL_WIDTH) {
     const gfx::Rect& window_bounds =
         controller_->GetContainerWindow()->GetRootWindow()->bounds();
     new_bounds.set_y(window_bounds.height() - new_bounds.height());
     // If shelf is positioned on the left side of screen, x is not 0. In
@@ skipping 43 matching lines @@
       // keyboard window is resized even if keyboard is hidden.
       if (controller_->keyboard_visible())
         controller_->NotifyKeyboardBoundsChanging(new_bounds);
     } else if (controller_->keyboard_mode() == FLOATING) {
       controller_->NotifyKeyboardBoundsChanging(gfx::Rect());
     }
   }
 }
 
 }  // namespace keyboard