Refactoring how WebVR eye bounds are handled

third_party/WebKit/Source/modules/vr/VRDisplay.cpp

 // Copyright 2016 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 "modules/vr/VRDisplay.h"
 
 #include "core/dom/DOMException.h"
 #include "core/dom/FrameRequestCallback.h"
 #include "core/dom/Fullscreen.h"
 #include "core/dom/ScriptedAnimationController.h"
@@ skipping 264 matching lines @@
   // allowed outside a user gesture so that the presented content may be
   // updated.
   if (firstPresent && !UserGestureIndicator::utilizeUserGesture()) {
     DOMException* exception = DOMException::create(
         InvalidStateError, "API can only be initiated by a user gesture.");
     resolver->reject(exception);
     ReportPresentationResult(PresentationResult::NotInitiatedByUserGesture);
     return promise;
   }
 
-  m_isPresenting = false;
-
   // A valid number of layers must be provided in order to present.
   if (layers.size() == 0 || layers.size() > m_capabilities->maxLayers()) {
     forceExitPresent();
     DOMException* exception =
         DOMException::create(InvalidStateError, "Invalid number of layers.");
     resolver->reject(exception);
     ReportPresentationResult(PresentationResult::InvalidNumberOfLayers);
     return promise;
   }
 
@@ skipping 45 matching lines @@
                                   Fullscreen::UnprefixedRequest);
 
     // Check to see if the canvas is still the current fullscreen
     // element once per second.
     m_fullscreenCheckTimer.startRepeating(1.0, BLINK_FROM_HERE);
   }
 
   if (firstPresent) {
     bool secureContext = scriptState->getExecutionContext()->isSecureContext();
     if (!m_display) {
+      forceExitPresent();
       DOMException* exception = DOMException::create(
           InvalidStateError, "The service is no longer active.");
       resolver->reject(exception);
       return promise;
     }
     m_display->RequestPresent(
         secureContext, convertToBaseCallback(WTF::bind(
                            &VRDisplay::onPresentComplete, wrapPersistent(this),
                            wrapPersistent(resolver))));
   } else {
@@ skipping 249 matching lines @@
   visitor->trace(m_capabilities);
   visitor->trace(m_stageParameters);
   visitor->trace(m_eyeParametersLeft);
   visitor->trace(m_eyeParametersRight);
   visitor->trace(m_layer);
   visitor->trace(m_renderingContext);
   visitor->trace(m_scriptedAnimationController);
 }
 
 }  // namespace blink