Allow calling FontCache::purge() at any timing

third_party/WebKit/Source/platform/fonts/FontCache.cpp

Index: third_party/WebKit/Source/platform/fonts/FontCache.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/FontCache.cpp b/third_party/WebKit/Source/platform/fonts/FontCache.cpp
index b863c7102127f79f2082b8638bb8d9daf0c1db73..0ac96452675abc570e699bc2bc2cb377830ec5c3 100644
--- a/third_party/WebKit/Source/platform/fonts/FontCache.cpp
+++ b/third_party/WebKit/Source/platform/fonts/FontCache.cpp
@@ -394,9 +394,9 @@ void FontCache::invalidateShapeCache() {
 }
 
 void FontCache::purge(PurgeSeverity PurgeSeverity) {
-  // We should never be forcing the purge while the FontCachePurgePreventer is
-  // in scope.
-  ASSERT(!m_purgePreventCount || PurgeSeverity == PurgeIfNeeded);
+  // Ideally we should never be forcing the purge while the
+  // FontCachePurgePreventer is in scope, but we call purge() at any timing
+  // via MemoryCoordinator.
   if (m_purgePreventCount)
     return;