Revert of Add CHECKs to ResourceLoader to investigate crashes

third_party/WebKit/Source/core/fetch/ResourceLoader.cpp

Index: third_party/WebKit/Source/core/fetch/ResourceLoader.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceLoader.cpp b/third_party/WebKit/Source/core/fetch/ResourceLoader.cpp
index 4602882d2b8595b7800a4e5ec5999bc2069acf79..dc438c8e512153a3b79514f12ecc1bc7a9c7ce1f 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceLoader.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceLoader.cpp
@@ -67,7 +67,7 @@
 }
 
 ResourceLoader::~ResourceLoader() {
-  CHECK(!m_loader);
+  DCHECK(!m_loader);
 }
 
 DEFINE_TRACE(ResourceLoader) {
@@ -302,7 +302,6 @@
     const WebURLResponse& webURLResponse,
     std::unique_ptr<WebDataConsumerHandle> handle) {
   DCHECK(!webURLResponse.isNull());
-  CHECK(m_resource);
 
   const ResourceResponse& response = webURLResponse.toResourceResponse();
 
@@ -355,13 +354,11 @@
     }
   }
 
-  CHECK(m_resource);
   context().dispatchDidReceiveResponse(
       m_resource->identifier(), response,
       m_resource->resourceRequest().frameType(),
       m_resource->resourceRequest().requestContext(), m_resource);
 
-  CHECK(m_resource);
   m_resource->responseReceived(response, std::move(handle));
   if (!m_resource->loader())
     return;