[inspector] removed ArrayLengthHelperFunction specialization for empty array

There is no zero length array usage in inspector codebase. We can safely remove template specialization.

BUG=chromium:635948
R=dgozman@chromium.org,alph@chromium.org

Review-Url: https://codereview.chromium.org/2340623002
Cr-Commit-Position: refs/heads/master@{#39428}

src/inspector/Allocator.h

@@ -27,11 +27,6 @@ enum NotNullTagEnum { NotNullLiteral };
 // 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))
 

src/v8.gyp

@@ -1755,7 +1755,6 @@
             4996,  # Deprecated function call.
           ],
           'cflags': [
-            '-Wno-zero-length-array',
             '-Wno-deprecated-declarations',
           ],
         }],