scheduler: Move the Blink scheduler into Blink

third_party/WebKit/public/platform/WebScheduler.h

 // Copyright 2014 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 WebScheduler_h
 #define WebScheduler_h
 
 #include "WebCommon.h"
+#include "WebString.h"
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "public/platform/WebViewScheduler.h"
 
 #include <memory>
 
 namespace blink {
 
 class WebView;
 
 // This class is used to submit tasks and pass other information from Blink to
 // the platform's scheduler.
+// TODO(skyostil): Replace this class with RendererScheduler.
 class BLINK_PLATFORM_EXPORT WebScheduler {
 public:
+    class BLINK_PLATFORM_EXPORT InterventionReporter {
+    public:
+        virtual ~InterventionReporter() {}
+
+        // The scheduler has performed an intervention, described by |message|,
+        // which should be reported to the developer.
+        virtual void ReportIntervention(const WebString& message) = 0;
+    };
+
     virtual ~WebScheduler() { }
 
     // Called to prevent any more pending tasks from running. Must be called on
     // the associated WebThread.
     virtual void shutdown() = 0;
 
     // Returns true if there is high priority work pending on the associated WebThread
     // and the caller should yield to let the scheduler service that work.
     // Must be called on the associated WebThread.
     virtual bool shouldYieldForHighPriorityWork() = 0;
@@ skipping 28 matching lines @@
     virtual void postIdleTaskAfterWakeup(const WebTraceLocation&, WebThread::IdleTask*) = 0;
 
     // Returns a WebTaskRunner for loading tasks. Can be called from any thread.
     virtual WebTaskRunner* loadingTaskRunner() = 0;
 
     // Returns a WebTaskRunner for timer tasks. Can be called from any thread.
     virtual WebTaskRunner* timerTaskRunner() = 0;
 
     // Creates a new WebViewScheduler for a given WebView. Must be called from
     // the associated WebThread.
-    virtual std::unique_ptr<WebViewScheduler> createWebViewScheduler(blink::WebView*) = 0;
+    virtual std::unique_ptr<WebViewScheduler> createWebViewScheduler(InterventionReporter*) = 0;
 
     // Suspends the timer queue and increments the timer queue suspension count.
     // May only be called from the main thread.
     virtual void suspendTimerQueue() = 0;
 
     // Decrements the timer queue suspension count and re-enables the timer queue
     // if the suspension count is zero and the current scheduler policy allows it.
     virtual void resumeTimerQueue() = 0;
 
     enum class NavigatingFrameType {
@@ skipping 17 matching lines @@
 
     void postIdleTask(const WebTraceLocation&, std::unique_ptr<IdleTask>);
     void postNonNestableIdleTask(const WebTraceLocation&, std::unique_ptr<IdleTask>);
     void postIdleTaskAfterWakeup(const WebTraceLocation&, std::unique_ptr<IdleTask>);
 #endif
 };
 
 } // namespace blink
 
 #endif // WebScheduler_h