Fix WebVR so we don't animation when stopped at a JS breakpoint

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

Index: third_party/WebKit/Source/modules/vr/VRDisplay.h
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplay.h b/third_party/WebKit/Source/modules/vr/VRDisplay.h
index 308ed3ff81c698d2a7ecad77b360dcd8777719d1..f2f8e2f36e25a9f133c0b564548dd3ca56c9d025 100644
--- a/third_party/WebKit/Source/modules/vr/VRDisplay.h
+++ b/third_party/WebKit/Source/modules/vr/VRDisplay.h
@@ -18,6 +18,8 @@
 #include "platform/wtf/text/WTFString.h"
 #include "public/platform/WebGraphicsContext3DProvider.h"
 
+#include "core/dom/SuspendableObject.h"
+
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
@@ -39,7 +41,7 @@ enum VREye { kVREyeNone, kVREyeLeft, kVREyeRight };
 
 class VRDisplay final : public EventTargetWithInlineData,
                         public ActiveScriptWrappable<VRDisplay>,
-                        public ContextLifecycleObserver,
+                        public SuspendableObject,
                         public device::mojom::blink::VRDisplayClient,
                         public device::mojom::blink::VRSubmitFrameClient {
   DEFINE_WRAPPERTYPEINFO();
@@ -89,6 +91,10 @@ class VRDisplay final : public EventTargetWithInlineData,
   // ScriptWrappable implementation.
   bool HasPendingActivity() const final;
 
+  // SuspendableObject:
+  void Suspend() override;
+  void Resume() override;
+
   void FocusChanged();
 
   DECLARE_VIRTUAL_TRACE();
@@ -209,6 +215,9 @@ class VRDisplay final : public EventTargetWithInlineData,
   device::mojom::blink::VRVSyncProviderPtr vr_v_sync_provider_;
 
   HeapDeque<Member<ScriptPromiseResolver>> pending_present_resolvers_;
+
+  bool suspended_ = false;

[haraken, 2017/06/08 00:55:12]

You can drop this flag and instead use executionContext->IsSuspended().

[billorr, 2017/06/08 04:20:21]

Done.

+  bool request_vsync_on_resume_ = false;
 };
 
 using VRDisplayVector = HeapVector<Member<VRDisplay>>;