Bug 1794893 - WebGLMemoryTracker ensured-registered in WebGLContext::ctor. r=gfx-reviewers,lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D200851

dom/canvas/WebGLContext.cpp

@@ -149,6 +149,7 @@ WebGLContext::WebGLContext(HostWebGLContext* host,
     host->mContext = this;
   }
   const FuncScope funcScope(*this, "<Create>");
+  WebGLMemoryTracker::EnsureRegistered();
 }
 
 WebGLContext::~WebGLContext() { DestroyResourcesAndContext(); }

dom/canvas/WebGLMemoryTracker.cpp

@@ -15,6 +15,14 @@ namespace mozilla {
 
 MOZ_DEFINE_MALLOC_SIZE_OF(WebGLShaderMallocSizeOf)
 
+void WebGLMemoryTracker::EnsureRegistered() {
+  static bool sIsRegistered = []() {
+    RegisterStrongMemoryReporter(new WebGLMemoryTracker);
+    return true;
+  }();
+  (void)sIsRegistered;
+}
+
 NS_IMETHODIMP
 WebGLMemoryTracker::CollectReports(nsIHandleReportCallback* aHandleReport,
                                    nsISupports* aData, bool) {

dom/canvas/WebGLMemoryTracker.h

@@ -15,6 +15,8 @@ class WebGLMemoryTracker : public nsIMemoryReporter {
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIMEMORYREPORTER
 
+  static void EnsureRegistered();
+
  private:
   virtual ~WebGLMemoryTracker() = default;
 };