[wasm] Use a Managed<WasmModule> to hold metadata about modules.

src/wasm/signature-map.h

Index: src/wasm/signature-map.h
diff --git a/src/wasm/signature-map.h b/src/wasm/signature-map.h
index 28c9fd63edee258f5531ba3649f18dd90e48109c..ea784246f299bcc3f22199d7235b548d6f114844 100644
--- a/src/wasm/signature-map.h
+++ b/src/wasm/signature-map.h
@@ -25,6 +25,9 @@ class SignatureMap {
   // Gets the index for a signature, returning {-1} if not found.
   int32_t Find(FunctionSig* sig) const;
 
+  // Compares two signatures for equality.

[rossberg, 2016/10/19 09:19:15]

Shouldn't this better be a method of Signature?

+  static bool Equal(FunctionSig* a, FunctionSig* b);

[Mircea Trofin, 2016/10/19 05:28:55]

Did you mean "Equals" (or maybe "Is" or "AreEqual")?

+
  private:
   // TODO(wasm): use a hashmap instead of an ordered map?
   struct CompareFunctionSigs {