[wasm] Rename an internal wasm cctest member.

Bug: 
Change-Id: Ia8fd50cad1c7d0dd82eeadb22807e301246423a8
Reviewed-on: https://chromium-review.googlesource.com/610309Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47286}

test/cctest/wasm/test-run-wasm-relocation.cc

@@ -32,7 +32,7 @@ using namespace v8::internal::compiler;
     /* global = global + p0 */                                                 \
     BUILD(r, WASM_SET_GLOBAL(1, ADD(WASM_GET_GLOBAL(0), WASM_GET_LOCAL(0))),   \
           WASM_GET_GLOBAL(0));                                                 \
-    CHECK_EQ(1, r.module().FunctionCodeSize());                                \
+    CHECK_EQ(1, r.module().CodeTableLength());                                 \
                                                                                \
     int filter = 1 << RelocInfo::WASM_GLOBAL_REFERENCE;                        \
                                                                                \

test/cctest/wasm/wasm-run-utils.h

@@ -126,7 +126,7 @@ class TestingModule : public ModuleEnv {
     return mem_start();
   }
 
-  size_t FunctionCodeSize() const { return function_code_.size(); }
+  size_t CodeTableLength() const { return function_code_.size(); }
 
   template <typename T>
   T* AddMemoryElems(uint32_t count) {