FontResource: introduce some CHECKs for setRevalidatingRequest

third_party/WebKit/Source/core/loader/resource/FontResource.cpp

Index: third_party/WebKit/Source/core/loader/resource/FontResource.cpp
diff --git a/third_party/WebKit/Source/core/loader/resource/FontResource.cpp b/third_party/WebKit/Source/core/loader/resource/FontResource.cpp
index 15569e199bf50ed0dd9f3facdeacd3be32f4e5bc..36a6efd35f116893e7e928f93b9fa2a9b20bfb41 100644
--- a/third_party/WebKit/Source/core/loader/resource/FontResource.cpp
+++ b/third_party/WebKit/Source/core/loader/resource/FontResource.cpp
@@ -105,6 +105,11 @@ void FontResource::didAddClient(ResourceClient* c) {
 void FontResource::setRevalidatingRequest(const ResourceRequest& request) {
   // Reload will use the same object, and needs to reset |m_loadLimitState|
   // before any didAddClient() is called again.
+  // TODO(toyoshim): Change following CHECKs to DCHECKs once we confirm these do
+  // not fire.
+  CHECK(isLoaded());
+  CHECK(!m_fontLoadShortLimitTimer.isActive());
+  CHECK(!m_fontLoadLongLimitTimer.isActive());
   m_loadLimitState = LoadNotStarted;
   Resource::setRevalidatingRequest(request);
 }