Fix overly-strict parameter checking of _getCallSiteData.

runtime/vm/service.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/service.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/globals.h"
 
@@ skipping 1951 matching lines @@
                  "%s: invalid 'targetId' parameter: "
                  "id '%s' does not correspond to a "
                  "script, library, class, or function",
                  js->method(), target_id);
   return true;
 }
 
 
 static const MethodParameter* get_coverage_params[] = {
   ISOLATE_PARAMETER,
+  new IdParameter("targetId", false),
   NULL,
 };
 
 
 static bool GetCoverage(Isolate* isolate, JSONStream* js) {
   // TODO(rmacnak): Remove this response; it is subsumed by GetCallSiteData.
   return GetHitsOrSites(isolate, js, false);
 }
 
 
 static const MethodParameter* get_call_site_data_params[] = {
   ISOLATE_PARAMETER,
-  new IdParameter("targetId", true),
+  new IdParameter("targetId", false),
   NULL,
 };
 
 
 static bool GetCallSiteData(Isolate* isolate, JSONStream* js) {
   return GetHitsOrSites(isolate, js, true);
 }
 
 
 static const MethodParameter* add_breakpoint_params[] = {
@@ skipping 1129 matching lines @@
     ServiceMethodDescriptor& method = service_methods_[i];
     if (strcmp(method_name, method.name) == 0) {
       return &method;
     }
   }
   return NULL;
 }
 
 
 }  // namespace dart