Refactor VR Shell Input. Locks input to click/scroll targets.

chrome/browser/android/vr_shell/textures/ui_texture.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/textures/ui_texture.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 13 matching lines @@
 namespace {
 
 static constexpr char kDefaultFontFamily[] = "sans-serif";
 
 }  // namespace
 
 UiTexture::UiTexture() = default;
 
 UiTexture::~UiTexture() = default;
 
+bool UiTexture::Update(int draw_flags) {
+  if (draw_flags == draw_flags_)
+    return false;
+  draw_flags_ = draw_flags;
+  return true;
+}
+
 void UiTexture::DrawAndLayout(SkCanvas* canvas, const gfx::Size& texture_size) {
   canvas->drawColor(SK_ColorTRANSPARENT);
   Draw(canvas, texture_size);
 }
 
 bool UiTexture::IsRTL() {
   return base::i18n::IsRTL();
 }
 
 gfx::FontList UiTexture::GetDefaultFontList(int size) {
@@ skipping 27 matching lines @@
     std::string name(sk_name.c_str());
     if (name != kDefaultFontFamily)
       names.insert(name);
   }
   for (const auto& name : names)
     fonts.push_back(gfx::Font(name, size));
   return gfx::FontList(fonts);
 }
 
 }  // namespace vr_shell