cc: HUD handle context lost in Gpu raster.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1702 matching lines @@
   }
 
   {
     TRACE_EVENT0("cc", "DrawLayers.FrameViewerTracing");
     TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(
         frame_viewer_instrumentation::kCategoryLayerTree,
         "cc::LayerTreeHostImpl", id_, AsValueWithFrame(frame));
   }
 
   const DrawMode draw_mode = GetDrawMode();
+  ResourceId evict_resource_id = 0U;
 
   // Because the contents of the HUD depend on everything else in the frame, the
   // contents of its texture are updated as the last thing before the frame is
   // drawn.
   if (active_tree_->hud_layer()) {
     TRACE_EVENT0("cc", "DrawLayers.UpdateHudTexture");
-    active_tree_->hud_layer()->UpdateHudTexture(
+    // For Ganesh backed HUD, a context loss may cause the drawing canvas to be
+    // invalid, return the resource id to evicted from quadlist.
+    evict_resource_id = active_tree_->hud_layer()->UpdateHudTexture(
         draw_mode, resource_provider_.get(),
         layer_tree_frame_sink_->context_provider());
+    if (evict_resource_id != 0)
+      active_tree_->hud_layer()->EvictHudQuad(frame->render_passes);
   }
 
   CompositorFrameMetadata metadata = MakeCompositorFrameMetadata();
   metadata.may_contain_video = frame->may_contain_video;
   metadata.activation_dependencies = std::move(frame->activation_dependencies);
   active_tree()->FinishSwapPromises(&metadata);
   for (auto& latency : metadata.latency_info) {
     TRACE_EVENT_WITH_FLOW1("input,benchmark", "LatencyInfo.Flow",
                            TRACE_ID_DONT_MANGLE(latency.trace_id()),
                            TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT,
@@ skipping 2674 matching lines @@
 
 void LayerTreeHostImpl::ShowScrollbarsForImplScroll(ElementId element_id) {
   if (!element_id)
     return;
   if (ScrollbarAnimationController* animation_controller =
           ScrollbarAnimationControllerForElementId(element_id))
     animation_controller->DidScrollUpdate();
 }
 
 }  // namespace cc