Introduce TaskRunner::RunsTasksInCurrentSequence()

third_party/WebKit/Source/platform/WebTaskRunner.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 WebTaskRunner_h
 #define WebTaskRunner_h
 
 #include <memory>
 #include "base/callback.h"
 #include "public/platform/WebCommon.h"
@@ skipping 47 matching lines @@
 // The blink representation of a chromium SingleThreadTaskRunner.
 class BLINK_PLATFORM_EXPORT WebTaskRunner
     : public ThreadSafeRefCounted<WebTaskRunner> {
  public:
   // Schedule a task to be run after |delayMs| on the the associated WebThread.
   // Can be called from any thread.
   virtual void PostDelayedTask(const WebTraceLocation&,
                                base::OnceClosure,
                                double delay_ms) = 0;
 
   // Returns true if the current thread is a thread on which a task may be run.

[gab, 2017/04/18 15:00:33]

Update interface comment.

   // Can be called from any thread.
-  virtual bool RunsTasksOnCurrentThread() = 0;
+  bool RunsTasksOnCurrentThread();
+  virtual bool RunsTasksInCurrentSequence() = 0;
 
   // ---
 
   // Headless Chrome virtualises time for determinism and performance (fast
   // forwarding of timers). To make this work some parts of blink (e.g. Timers)
   // need to use virtual time, however by default new code should use the normal
   // non-virtual time APIs.
 
   // Returns a double which is the number of seconds since epoch (Jan 1, 1970).
   // This may represent either the real time, or a virtual time depending on
@@ skipping 38 matching lines @@
   WebTaskRunner() = default;
   virtual ~WebTaskRunner();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebTaskRunner);
 };
 
 }  // namespace blink
 
 #endif  // WebTaskRunner_h