Flush after ResourcePool deletions complete

cc/resources/resource_pool.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_pool.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 392 matching lines @@
                                 time_from_now);
 }
 
 void ResourcePool::EvictExpiredResources() {
   evict_expired_resources_pending_ = false;
   base::TimeTicks current_time = base::TimeTicks::Now();
 
   EvictResourcesNotUsedSince(current_time - resource_expiration_delay_);
 
   if (unused_resources_.empty() && busy_resources_.empty()) {
-    // Nothing is evictable.
+    // If nothing is evictable, we have deleted one (and possibly more)
+    // resources without any new activity. Flush to ensure these deletions are
+    // processed.
+    resource_provider_->FlushPendingDeletions();
     return;
   }
 
   // If we still have evictable resources, schedule a call to
   // EvictExpiredResources at the time when the LRU buffer expires.
   ScheduleEvictExpiredResourcesIn(GetUsageTimeForLRUResource() +
                                   resource_expiration_delay_ - current_time);
 }
 
 void ResourcePool::EvictResourcesNotUsedSince(base::TimeTicks time_limit) {
@@ skipping 66 matching lines @@
       // Release all resources, regardless of how recently they were used.
       EvictResourcesNotUsedSince(base::TimeTicks() + base::TimeDelta::Max());
       break;
     case base::MemoryState::UNKNOWN:
       // NOT_REACHED.
       break;
   }
 }
 
 }  // namespace cc