[wasm] Change the constant kV8MaxWasmTableSize to a command line flag.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 423bebf0f70922c1ded524fc921726c41dc42558..4149f572eab99222015d8be1ce02117cfb308c39 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -504,6 +504,8 @@ DEFINE_BOOL(wasm_disable_structured_cloning, false,
 DEFINE_INT(wasm_num_compilation_tasks, 10,
            "number of parallel compilation tasks for wasm")
 DEFINE_UINT(wasm_max_mem_pages, 16384, "maximum memory size of a wasm instance")
+DEFINE_UINT(wasm_max_table_size, 10000000,

[titzer, 2017/01/23 18:35:00]

I think it'd be nicer if this used the value defined by wasm-limits.h. Is it
possible to do that by only including the wasm-limits.h file in the
flag-definitions.cc file? If so, then please do that.

Otherwise lgtm

+            "maximum table size of a wasm instance")
 DEFINE_BOOL(trace_wasm_encoder, false, "trace encoding of wasm code")
 DEFINE_BOOL(trace_wasm_decoder, false, "trace decoding of wasm code")
 DEFINE_BOOL(trace_wasm_decode_time, false, "trace decoding time of wasm code")