Flush after ResourcePool deletions complete

cc/resources/resource_provider.cc

 // Copyright 2012 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/resources/resource_provider.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 829 matching lines @@
     resource->pixels = nullptr;
   }
   if (resource->gpu_memory_buffer) {
     DCHECK(resource->origin == Resource::INTERNAL ||
            resource->origin == Resource::DELEGATED);
     resource->gpu_memory_buffer.reset();
   }
   resources_.erase(it);
 }
 
+void ResourceProvider::FlushPendingDeletions() const {
+  if (auto* gl = ContextGL())
+    gl->ShallowFlushCHROMIUM();
+}
+
 ResourceProvider::ResourceType ResourceProvider::GetResourceType(
     ResourceId id) {
   return GetResource(id)->type;
 }
 
 GLenum ResourceProvider::GetResourceTextureTarget(ResourceId id) {
   return GetResource(id)->target;
 }
 
 bool ResourceProvider::IsImmutable(ResourceId id) {
@@ skipping 1289 matching lines @@
 
     const int kImportance = 2;
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
   }
 
   return true;
 }
 
 }  // namespace cc