[asm.js] Remove unused --trace-wasm-encoder flag.

R=ahaas@chromium.org

Change-Id: If0001d1b829540d76a3cef54a495322ca624d030
Reviewed-on: https://chromium-review.googlesource.com/507227Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45373}

src/flag-definitions.h

@@ -545,7 +545,6 @@ DEFINE_UINT(wasm_max_mem_pages, v8::internal::wasm::kV8MaxWasmMemoryPages,
             "maximum memory size of a wasm instance")
 DEFINE_UINT(wasm_max_table_size, v8::internal::wasm::kV8MaxWasmTableSize,
             "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")
 DEFINE_BOOL(trace_wasm_compiler, false, "trace compiling of wasm code")

src/wasm/wasm-module-builder.cc

@@ -18,15 +18,6 @@
 
 #include "src/v8memory.h"
 
-#if DEBUG
-#define TRACE(...)                                    \
-  do {                                                \
-    if (FLAG_trace_wasm_encoder) PrintF(__VA_ARGS__); \
-  } while (false)
-#else
-#define TRACE(...)
-#endif
-
 namespace v8 {
 namespace internal {
 namespace wasm {
@@ -320,7 +311,6 @@ uint32_t WasmModuleBuilder::AddGlobal(ValueType type, bool exported,
 
 void WasmModuleBuilder::WriteTo(ZoneBuffer& buffer) const {
   // == Emit magic =============================================================
-  TRACE("emit magic\n");
   buffer.write_u32(kWasmMagic);
   buffer.write_u32(kWasmVersion);