android: Use UIResource for overscroll glow

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 4a1e4149c0348e5e0f36e7a6d26ace361846e455..2d21e33b2ec23fbdae0ab8256e4c5659f14f5ad1 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -186,7 +186,6 @@ RenderWidgetHostViewAndroid::RenderWidgetHostViewAndroid(
       weak_ptr_factory_(this),
       overscroll_effect_enabled_(!CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableOverscrollEdgeEffect)),
-      overscroll_effect_(OverscrollGlow::Create(overscroll_effect_enabled_)),
       gesture_provider_(CreateGestureProviderConfig(), this),
       gesture_text_selector_(this),
       flush_input_requested_(false),
@@ -354,7 +353,7 @@ void RenderWidgetHostViewAndroid::MovePluginWindows(
 void RenderWidgetHostViewAndroid::Focus() {
   host_->Focus();
   host_->SetInputMethodActive(true);
-  if (overscroll_effect_enabled_)
+  if (overscroll_effect_)
     overscroll_effect_->Enable();
 }
 
@@ -362,7 +361,8 @@ void RenderWidgetHostViewAndroid::Blur() {
   host_->ExecuteEditCommand("Unselect", "");
   host_->SetInputMethodActive(false);
   host_->Blur();
-  overscroll_effect_->Disable();
+  if (overscroll_effect_)
+    overscroll_effect_->Disable();
 }
 
 bool RenderWidgetHostViewAndroid::HasFocus() const {
@@ -859,8 +859,10 @@ void RenderWidgetHostViewAndroid::ComputeContentsSize(
       gfx::Size(texture_size_in_layer_.width() - offset.x(),
                 texture_size_in_layer_.height() - offset.y());
 
-  overscroll_effect_->UpdateDisplayParameters(
-      CreateOverscrollDisplayParameters(frame_metadata));
+  if (overscroll_effect_) {
+    overscroll_effect_->UpdateDisplayParameters(
+        CreateOverscrollDisplayParameters(frame_metadata));
+  }
 }
 
 void RenderWidgetHostViewAndroid::InternalSwapCompositorFrame(
@@ -1029,7 +1031,7 @@ void RenderWidgetHostViewAndroid::AttachLayers() {
     return;
 
   content_view_core_->AttachLayer(layer_);
-  if (overscroll_effect_enabled_)
+  if (overscroll_effect_)
     overscroll_effect_->Enable();
   layer_->SetHideLayerAndSubtree(!is_showing_);
 }
@@ -1041,7 +1043,8 @@ void RenderWidgetHostViewAndroid::RemoveLayers() {
     return;
 
   content_view_core_->RemoveLayer(layer_);
-  overscroll_effect_->Disable();
+  if (overscroll_effect_)
+    overscroll_effect_->Disable();
 }
 
 void RenderWidgetHostViewAndroid::SetNeedsAnimate() {
@@ -1049,7 +1052,7 @@ void RenderWidgetHostViewAndroid::SetNeedsAnimate() {
 }
 
 bool RenderWidgetHostViewAndroid::Animate(base::TimeTicks frame_time) {
-  return overscroll_effect_->Animate(frame_time);
+  return overscroll_effect_ ? overscroll_effect_->Animate(frame_time) : false;
 }
 
 void RenderWidgetHostViewAndroid::AcceleratedSurfacePostSubBuffer(
@@ -1209,8 +1212,8 @@ void RenderWidgetHostViewAndroid::SendMouseWheelEvent(
 void RenderWidgetHostViewAndroid::SendGestureEvent(
     const blink::WebGestureEvent& event) {
   // Sending a gesture that may trigger overscroll should resume the effect.
-  if (overscroll_effect_enabled_)
-   overscroll_effect_->Enable();
+  if (overscroll_effect_)
+    overscroll_effect_->Enable();
 
   if (host_)
     host_->ForwardGestureEventWithLatencyInfo(event, CreateLatencyInfo(event));
@@ -1231,7 +1234,9 @@ void RenderWidgetHostViewAndroid::DidOverscroll(
     return;
 
   const float device_scale_factor = content_view_core_->GetDpiScale();
-  if (overscroll_effect_->OnOverscrolled(
+
+  if (overscroll_effect_ &&
+      overscroll_effect_->OnOverscrolled(
           content_view_core_->GetLayer(),
           base::TimeTicks::Now(),
           gfx::ScaleVector2d(params.accumulated_overscroll,
@@ -1283,6 +1288,16 @@ void RenderWidgetHostViewAndroid::SetContentViewCore(
 
   if (resize && content_view_core_)
     WasResized();
+
+  if (!content_view_core_) {
+    overscroll_effect_.reset();
+  } else if (overscroll_effect_enabled_ && !overscroll_effect_) {
+    DCHECK(content_view_core_->GetWindowAndroid()->GetCompositor());
+    overscroll_effect_ =
+        OverscrollGlow::Create(&content_view_core_->GetWindowAndroid()
+                                    ->GetCompositor()
+                                    ->GetSystemUIResourceManager());
+  }
 }
 
 void RenderWidgetHostViewAndroid::RunAckCallbacks() {