Replace ASSERT with DCHECK in modules/fetch.

third_party/WebKit/Source/modules/fetch/Body.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/fetch/Body.h"
 
 #include <memory>
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
@@ skipping 185 matching lines @@
   } else {
     resolver->Resolve(String());
   }
   return promise;
 }
 
 ScriptValue Body::body(ScriptState* script_state) {
   if (!BodyBuffer())
     return ScriptValue::CreateNull(script_state);
   ScriptValue stream = BodyBuffer()->Stream();
-  ASSERT(stream.GetScriptState() == script_state);
+  DCHECK_EQ(stream.GetScriptState(), script_state);
   return stream;
 }
 
 bool Body::bodyUsed() {
   return BodyBuffer() && BodyBuffer()->IsStreamDisturbed();
 }
 
 bool Body::IsBodyLocked() {
   return BodyBuffer() && BodyBuffer()->IsStreamLocked();
 }
@@ skipping 10 matching lines @@
 
 ScriptPromise Body::RejectInvalidConsumption(ScriptState* script_state) {
   if (IsBodyLocked() || bodyUsed())
     return ScriptPromise::Reject(
         script_state, V8ThrowException::CreateTypeError(
                           script_state->GetIsolate(), "Already read"));
   return ScriptPromise();
 }
 
 }  // namespace blink