Do not leak message object beyond try-catch.

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 9d626a6a47d3d1258ccd6da4c28e3e952e5e49ff..d3eb1d111e989a1637b70dddc41f72eaabac7ab0 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -5352,6 +5352,8 @@ void FullCodeGenerator::EnterFinallyBlock() {
   __ mov(ip, Operand(pending_message_obj));
   __ ldr(r1, MemOperand(ip));
   __ push(r1);
+
+  ClearPendingMessage();
 }
 
 
@@ -5374,6 +5376,16 @@ void FullCodeGenerator::ExitFinallyBlock() {
 }
 
 
+void FullCodeGenerator::ClearPendingMessage() {
+  DCHECK(!result_register().is(r1));
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ LoadRoot(r1, Heap::kTheHoleValueRootIndex);
+  __ mov(ip, Operand(pending_message_obj));
+  __ str(r1, MemOperand(ip));
+}
+
+
 #undef __