Fix omnibox height when less than 64 pixels tall.

ui/aura/window_tree_host.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/aura/window_tree_host.h"
 
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_transformer.h"
 #include "ui/aura/window.h"
@@ skipping 163 matching lines @@
   compositor_.reset(new ui::Compositor(GetAcceleratedWidget()));
   DCHECK(compositor_.get());
 }
 
 void WindowTreeHost::NotifyHostResized(const gfx::Size& new_size) {
   // The compositor should have the same size as the native root window host.
   // Get the latest scale from display because it might have been changed.
   compositor_->SetScaleAndSize(GetDeviceScaleFactorFromDisplay(window()),
                                new_size);
 
+  gfx::Size layer_size = GetBounds().size();
   // The layer, and the observers should be notified of the
   // transformed size of the root window.
-  UpdateRootWindowSize(new_size);
-  delegate_->OnHostResized(new_size);
+  UpdateRootWindowSize(layer_size);
+  delegate_->OnHostResized(layer_size);
 }
 
 #if defined(OS_ANDROID)
 // static
 WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
   // This is only hit for tests and ash, right now these aren't an issue so
   // adding the CHECK.
   // TODO(sky): decide if we want a factory.
   CHECK(false);
   return NULL;
 }
 #endif
 
 }  // namespace aura