Remove the default contains_call parameter on location summaries.

runtime/vm/locations.h

Index: runtime/vm/locations.h
diff --git a/runtime/vm/locations.h b/runtime/vm/locations.h
index 1393d312132253d2ee84c3782e35220854a7bc5d..c47a5603cf93715bbd8f5ddad7ad5451ffdb83ea 100644
--- a/runtime/vm/locations.h
+++ b/runtime/vm/locations.h
@@ -52,7 +52,7 @@ class Location : public ValueObject {
   enum {
     // Number of bits required to encode Kind value.
     kBitsForKind = 3,
-    kBitsForPayload = kWordSize * kBitsPerByte - kBitsForKind
+    kBitsForPayload = kWordSize * kBitsPerByte - kBitsForKind,
   };
 
   static const uword kInvalidLocation = 0;
@@ -214,10 +214,9 @@ class LocationSummary : public ZoneAllocated {
     kCall,
   };
 
-  // TODO(vegorov): remove unsafe kNoCall default.
   LocationSummary(intptr_t input_count,
                   intptr_t temp_count,
-                  ContainsCall call = kNoCall);
+                  LocationSummary::ContainsCall contains_call);
 
   intptr_t input_count() const {
     return input_locations_.length();
@@ -275,7 +274,7 @@ class LocationSummary : public ZoneAllocated {
 
   static LocationSummary* Make(intptr_t input_count,
                                Location out,
-                               ContainsCall contains_call = kNoCall);
+                               LocationSummary::ContainsCall contains_call);
 
  private:
   // TODO(vegorov): replace with ZoneArray.