[runtime] Use DCHECK_EQ instead of DCHECK for number of args.

src/runtime/runtime-proxy.cc

 // Copyright 2014 the V8 project 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 "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/elements.h"
 #include "src/factory.h"
 #include "src/isolate-inl.h"
@@ skipping 117 matching lines @@
         isolate,
         NewTypeError(MessageTemplate::kProxyConstructNonObject, new_object));
   }
   // 10. Return newObj.
   return *new_object;
 }
 
 
 RUNTIME_FUNCTION(Runtime_IsJSProxy) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(Object, obj, 0);
   return isolate->heap()->ToBoolean(obj->IsJSProxy());
 }
 
 
 RUNTIME_FUNCTION(Runtime_JSProxyGetHandler) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(JSProxy, proxy, 0);
   return proxy->handler();
 }
 
 
 RUNTIME_FUNCTION(Runtime_JSProxyGetTarget) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(JSProxy, proxy, 0);
   return proxy->target();
 }
 
 
 RUNTIME_FUNCTION(Runtime_JSProxyRevoke) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, 0);
   JSProxy::Revoke(proxy);
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8