Allow VRDisplay to specify which frame the layer bounds should be updated at.

chrome/browser/android/vr_shell/vr_shell_delegate.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_delegate.h"
 
 #include "base/android/jni_android.h"
 #include "chrome/browser/android/vr_shell/vr_shell.h"
 #include "device/vr/android/gvr/gvr_device_provider.h"
 #include "jni/VrShellDelegate_jni.h"
 
 using base::android::JavaParamRef;
 using base::android::AttachCurrentThread;
 
 namespace vr_shell {
 
 // A non presenting delegate for magic window mode.
 class GvrNonPresentingDelegate : public device::GvrDelegate {
  public:
   explicit GvrNonPresentingDelegate(jlong context) {
     gvr_api_ =
         gvr::GvrApi::WrapNonOwned(reinterpret_cast<gvr_context*>(context));
   }
 
   virtual ~GvrNonPresentingDelegate() = default;
 
   // GvrDelegate implementation
   void SetWebVRSecureOrigin(bool secure_origin) override {}
   void SubmitWebVRFrame() override {}
-  void UpdateWebVRTextureBounds(const gvr::Rectf& left_bounds,
+  void UpdateWebVRTextureBounds(uint32_t frame_index,
+                                const gvr::Rectf& left_bounds,
                                 const gvr::Rectf& right_bounds) override {}
   void SetGvrPoseForWebVr(const gvr::Mat4f& pose,
                           uint32_t pose_index) override {}
   void SetWebVRRenderSurfaceSize(int width, int height) override {}
   gvr::Sizei GetWebVRCompositorSurfaceSize() override {
     return device::kInvalidRenderTargetSize; }
   gvr::GvrApi* gvr_api() override { return gvr_api_.get(); }
  private:
   std::unique_ptr<gvr::GvrApi> gvr_api_;
 };
@@ skipping 115 matching lines @@
 
 bool RegisterVrShellDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   return reinterpret_cast<intptr_t>(new VrShellDelegate(env, obj));
 }
 
 }  // namespace vr_shell