Revert of [inspector] removed ArrayLengthHelperFunction specialization for empty array

src/inspector/Allocator.h

 // Copyright 2016 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.
 
 #ifndef V8_INSPECTOR_ALLOCATOR_H_
 #define V8_INSPECTOR_ALLOCATOR_H_
 
 #include <cstddef>
 #include <cstdint>
 
 enum NotNullTagEnum { NotNullLiteral };
 
 #define V8_INSPECTOR_DISALLOW_NEW()                           \
  private:                                                     \
   void* operator new(size_t) = delete;                        \
   void* operator new(size_t, NotNullTagEnum, void*) = delete; \
   void* operator new(size_t, void*) = delete;                 \
                                                               \
  public:
 
 #define V8_INSPECTOR_DISALLOW_COPY(ClassName) \
  private:                                     \
   ClassName(const ClassName&) = delete;       \
   ClassName& operator=(const ClassName&) = delete
 
 // Macro that returns a compile time constant with the length of an array, but
 // gives an error if passed a non-array.
 template <typename T, std::size_t Size>
 char (&ArrayLengthHelperFunction(T (&)[Size]))[Size];
+// GCC needs some help to deduce a 0 length array.
+#if defined(__GNUC__)
+template <typename T>
+char (&ArrayLengthHelperFunction(T (&)[0]))[0];
+#endif
 #define V8_INSPECTOR_ARRAY_LENGTH(array) \
   sizeof(::ArrayLengthHelperFunction(array))
 
 #endif  // V8_INSPECTOR_ALLOCATOR_H_