blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.h

 // Copyright 2015 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.
 
 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_SETS_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_SETS_H_
 
 #include <stddef.h>
 
 #include <map>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "platform/scheduler/base/intrusive_heap.h"
 #include "platform/scheduler/base/task_queue_impl.h"
 #include "platform/scheduler/base/work_queue.h"
 #include "public/platform/WebCommon.h"
 
 namespace blink {
 namespace scheduler {
 namespace internal {
-class TaskQueueImpl;
 
 // There is a WorkQueueSet for each scheduler priority and each WorkQueueSet
 // uses a EnqueueOrderToWorkQueueMap to keep track of which queue in the set has
 // the oldest task (i.e. the one that should be run next if the
 // TaskQueueSelector chooses to run a task a given priority).  The reason this
 // works is because std::map is a tree based associative container and all the
 // values are kept in sorted order.
 class BLINK_PLATFORM_EXPORT WorkQueueSets {
  public:
   WorkQueueSets(size_t num_sets, const char* name);
@@ skipping 49 matching lines @@
   const char* name_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkQueueSets);
 };
 
 }  // namespace internal
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_WORK_QUEUE_SETS_H_