Fix content quad size and translation

chrome/browser/android/vr_shell/ui_scene_manager.cc

 // Copyright 2017 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/android/vr_shell/ui_scene_manager.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/ui_element.h"
 #include "chrome/browser/android/vr_shell/ui_scene.h"
 
@@ skipping 50 matching lines @@
   element->hit_testable = false;
   element->lock_to_fov = true;
   transient_security_warning_ = element.get();
   scene_->AddUiElement(std::move(element));
 
   // Main web content quad.
   element = base::MakeUnique<UiElement>();
   element->id = id++;
   element->name = "Content";
   element->fill = vr_shell::Fill::CONTENT;
-  element->size = {(1.6f * (16 / 9)), 1.6f, 1};
-  element->translation = {0, 0, -2};
+  element->size = {2.4f, 1.6f, 1};

[mthiesse, 2017/04/20 17:21:37]

nit: Make constants, or otherwise show your work for generating these numbers

+  element->translation = {0, -0.1f, -2.5f};
   element->visible = false;
   main_content_ = element.get();
   scene_->AddUiElement(std::move(element));
 }
 
 UiSceneManager::~UiSceneManager() {}
 
 base::WeakPtr<UiSceneManager> UiSceneManager::GetWeakPtr() {
   return weak_ptr_factory_.GetWeakPtr();
 }
@@ skipping 20 matching lines @@
   } else {
     security_warning_timer_.Stop();
   }
 }
 
 void UiSceneManager::OnSecurityWarningTimer() {
   transient_security_warning_->visible = false;
 }
 
 }  // namespace vr_shell