Tie VR omnibox to page load progress through TabObserver.

chrome/browser/android/vr_shell/vr_shell.cc

 // Copyright 2016 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/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/platform_thread.h"
@@ skipping 250 matching lines @@
   GLThread* thread = static_cast<GLThread*>(gl_thread_.get());
   PostToGlThreadWhenReady(
       base::Bind(&VrShellGl::SetWebVrMode, thread->GetVrShellGl(), enabled));
   if (enabled) {
     html_interface_->SetMode(UiInterface::Mode::WEB_VR);
   } else {
     html_interface_->SetMode(UiInterface::Mode::STANDARD);
   }
 }
 
+void VrShell::OnLoadProgressChanged(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj,
+    double progress) {
+  html_interface_->SetLoadProgress(progress);
+}
+
 void VrShell::SetGvrPoseForWebVr(const gvr::Mat4f& pose, uint32_t pose_num) {
   GLThread* thread = static_cast<GLThread*>(gl_thread_.get());
   if (thread->IsRunning()) {
     thread->task_runner()->PostTask(
         FROM_HERE, base::Bind(&VrShellGl::SetGvrPoseForWebVr,
                               thread->GetVrShellGl(), pose, pose_num));
   }
 }
 
 void VrShell::SetWebVRRenderSurfaceSize(int width, int height) {
@@ skipping 196 matching lines @@
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, content::WebContents::FromJavaWebContents(content_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(content_window_android),
       content::WebContents::FromJavaWebContents(ui_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(ui_window_android),
       for_web_vr, VrShellDelegate::GetNativeDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell