[wasm] [asmjs] Route asm.js warnings to the dev console.

src/asmjs/asm-typer.h

Index: src/asmjs/asm-typer.h
diff --git a/src/asmjs/asm-typer.h b/src/asmjs/asm-typer.h
index 0505481c25a0b3f0295239f29bf83fdb25b46ffd..53eaabaf3d92019bd5b142dbf785853417540651 100644
--- a/src/asmjs/asm-typer.h
+++ b/src/asmjs/asm-typer.h
@@ -15,6 +15,7 @@
 #include "src/ast/ast-types.h"
 #include "src/ast/ast.h"
 #include "src/effects.h"
+#include "src/messages.h"
 #include "src/type-info.h"
 #include "src/zone/zone-containers.h"
 #include "src/zone/zone.h"
@@ -70,7 +71,7 @@ class AsmTyper final {
 
   bool Validate();
 
-  const char* error_message() const { return error_message_; }
+  Handle<JSMessageObject> error_message() const { return error_message_; }
 
   AsmType* TypeOf(AstNode* node) const;
   AsmType* TypeOf(Variable* v) const;
@@ -349,7 +350,7 @@ class AsmTyper final {
   static const int kErrorMessageLimit = 128;
   AsmType* fround_type_;
   AsmType* ffi_type_;
-  char error_message_[kErrorMessageLimit];
+  Handle<JSMessageObject> error_message_;
   StdlibSet stdlib_uses_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(AsmTyper);