Android: Consolidate and simplify VSync logic

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 2369f6feafc577b4ced65890cdb50ce580dbba4d..80735faafc6f0b90ad45f2544967b68e21f7a769 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -89,10 +89,6 @@ namespace content {
 
 namespace {
 
-const unsigned int kDefaultVSyncIntervalMicros = 16666u;
-// TODO(brianderson): Use adaptive draw-time estimation.
-const float kDefaultBrowserCompositeVSyncFraction = 1.0f / 3;
-
 const void* kContentViewUserDataKey = &kContentViewUserDataKey;
 
 int GetRenderProcessIdFromRenderViewHost(RenderViewHost* host) {
@@ -232,10 +228,6 @@ ContentViewCoreImpl::ContentViewCoreImpl(JNIEnv* env,
       web_contents_(static_cast<WebContentsImpl*>(web_contents)),
       root_layer_(cc::Layer::Create()),
       dpi_scale_(GetPrimaryDisplayDeviceScaleFactor()),
-      vsync_interval_(base::TimeDelta::FromMicroseconds(
-          kDefaultVSyncIntervalMicros)),
-      expected_browser_composite_time_(base::TimeDelta::FromMicroseconds(
-          kDefaultVSyncIntervalMicros * kDefaultBrowserCompositeVSyncFraction)),
       view_android_(view_android),
       window_android_(window_android),
       gesture_provider_(GetGestureProviderConfig(), this),
@@ -443,7 +435,6 @@ void ContentViewCoreImpl::OnTabCrashed() {
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
-  Java_ContentViewCore_resetVSyncNotification(env, obj.obj());
 }
 
 // All positions and sizes are in CSS pixels.
@@ -867,30 +858,6 @@ void ContentViewCoreImpl::LoadUrl(
   GetWebContents()->GetController().LoadURLWithParams(params);
 }
 
-void ContentViewCoreImpl::AddBeginFrameSubscriber() {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
-    return;
-  Java_ContentViewCore_addVSyncSubscriber(env, obj.obj());
-}
-
-void ContentViewCoreImpl::RemoveBeginFrameSubscriber() {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
-    return;
-  Java_ContentViewCore_removeVSyncSubscriber(env, obj.obj());
-}
-
-void ContentViewCoreImpl::SetNeedsAnimate() {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
-    return;
-  Java_ContentViewCore_setNeedsAnimate(env, obj.obj());
-}
-
 ui::ViewAndroid* ContentViewCoreImpl::GetViewAndroid() const {
   // view_android_ should never be null for Chrome.
   DCHECK(view_android_);
@@ -1383,54 +1350,6 @@ void ContentViewCoreImpl::RemoveJavascriptInterface(JNIEnv* env,
       ConvertJavaStringToUTF16(env, name));
 }
 
-void ContentViewCoreImpl::UpdateVSyncParameters(JNIEnv* env, jobject /* obj */,
-                                                jlong timebase_micros,
-                                                jlong interval_micros) {
-  RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
-  if (!view)
-    return;
-
-  RenderWidgetHostImpl* host = RenderWidgetHostImpl::From(
-      view->GetRenderWidgetHost());
-
-  host->UpdateVSyncParameters(
-      base::TimeTicks::FromInternalValue(timebase_micros),
-      base::TimeDelta::FromMicroseconds(interval_micros));
-
-  vsync_interval_ =
-      base::TimeDelta::FromMicroseconds(interval_micros);
-  expected_browser_composite_time_ =
-      vsync_interval_ * kDefaultBrowserCompositeVSyncFraction;
-}
-
-void ContentViewCoreImpl::OnVSync(JNIEnv* env, jobject /* obj */,
-                                  jlong frame_time_micros) {
-  base::TimeTicks frame_time =
-      base::TimeTicks::FromInternalValue(frame_time_micros);
-  SendBeginFrame(frame_time);
-}
-
-void ContentViewCoreImpl::SendBeginFrame(base::TimeTicks frame_time) {
-  RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
-  if (!view)
-    return;
-
-  base::TimeTicks display_time = frame_time + vsync_interval_;
-  base::TimeTicks deadline = display_time - expected_browser_composite_time_;
-
-  view->SendBeginFrame(
-      cc::BeginFrameArgs::Create(frame_time, deadline, vsync_interval_));
-}
-
-jboolean ContentViewCoreImpl::OnAnimate(JNIEnv* env, jobject /* obj */,
-                                        jlong frame_time_micros) {
-  RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
-  if (!view)
-    return false;
-
-  return view->Animate(base::TimeTicks::FromInternalValue(frame_time_micros));
-}
-
 void ContentViewCoreImpl::WasResized(JNIEnv* env, jobject obj) {
   RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
   if (view)