Tidy AutoplayExperimentHelper.

third_party/WebKit/Source/core/html/AutoplayExperimentHelper.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 AutoplayExperimentHelper_h
 #define AutoplayExperimentHelper_h
 
-#include "core/page/Page.h"
+#include "core/page/PageVisibilityState.h"
 #include "platform/Timer.h"
 #include "platform/geometry/IntRect.h"
 
 namespace blink {
+
 class Document;
-class HTMLMediaElement;
-class EventListener;
-class LayoutObject;
 class AutoplayExperimentTest;
 
 // These values are used for a histogram. Do not reorder.
 enum AutoplayMetrics {
     // Media element with autoplay seen.
     AutoplayMediaFound = 0,
     // Autoplay enabled and user stopped media play at any point.
     AutoplayPaused = 1,
     // Autoplay enabled but user bailed out on media play early.
     AutoplayBailout = 2,
@@ skipping 127 matching lines @@
     void recordSandboxFailure();
     void loadingStarted();
     void playbackStarted();
     void playbackStopped();
     void initialPlayWithUserGesture();
 
     // Returns true if and only if any experiment is enabled (i.e., |m_mode|
     // is not ExperimentOff).
     bool isExperimentEnabled();
 
-    // Clean up.  For Oilpan, this means "early in HTMLMediaElement's dispose".
-    // For non-Oilpan, just delete the object.
-    void dispose();
-
     // Remove the user gesture requirement, and record why.  If there is no
     // gesture requirement, then this does nothing.
     void unlockUserGesture(AutoplayMetrics);
 
     // Set the reason that we're overridding the user gesture.  If there is no
     // gesture requirement, then this does nothing.
     void setDeferredOverrideReason(AutoplayMetrics);
 
     // Return true if and only if the user gesture requirement is currently
     // overridden by the experiment, permitting playback.
@@ skipping 89 matching lines @@
     // This method takes no action after it is called once.
     void autoplayMediaEncountered();
 
     // If we are about to enter a paused state, call this to record
     // autoplay metrics.
     void recordMetricsBeforePause();
 
     // Process a timer for checking visibility.
     void viewportTimerFired(Timer<AutoplayExperimentHelper>*);
 
-    // Return our media element's document.
-    Document& document() const;
-
-    Client& client() const;
+    Client& client() const { return *m_client; }
 
     bool isLockedPendingUserGesture() const;
 
     inline bool enabled(Mode mode) const
     {
-        return ((int)m_mode) & ((int)mode);
+        return static_cast<int>(m_mode) & static_cast<int>(mode);
     }
 
     Mode fromString(const String& mode);
 
     void recordAutoplayMetric(AutoplayMetrics);
 
     // Could stopping at this point be considered a bailout of playback?
     // (as in, "The user really didn't want to play this").
     bool isBailout() const;
 
@@ skipping 49 matching lines @@
 inline AutoplayExperimentHelper::Mode& operator|=(AutoplayExperimentHelper::Mode& a,
     const AutoplayExperimentHelper::Mode& b)
 {
     a = static_cast<AutoplayExperimentHelper::Mode>(static_cast<int>(a) | static_cast<int>(b));
     return a;
 }
 
 } // namespace blink
 
 #endif // AutoplayExperimentHelper_h