VM service fixes for noopt/precompiled.

runtime/vm/service.cc

Index: runtime/vm/service.cc
diff --git a/runtime/vm/service.cc b/runtime/vm/service.cc
index c8912eb48c240e41cc2a646e40a21cbc6536d69c..9d07e528f97b6a33385db001bc7645390aa13bac 100644
--- a/runtime/vm/service.cc
+++ b/runtime/vm/service.cc
@@ -2419,6 +2419,11 @@ static const MethodParameter* get_source_report_params[] = {
 
 
 static bool GetSourceReport(Thread* thread, JSONStream* js) {
+  if (!thread->isolate()->compilation_allowed()) {
+    js->PrintError(kFeatureDisabled,
+        "Cannot get source report when running a precompiled program.");

[Cutch, 2016/02/17 19:13:08]

We only compile if "forceCompile" is set to true. Maybe check if some parts of a
source report can work without compilation.

+    return true;
+  }
   const char* reports_str = js->LookupParam("reports");
   const EnumListParameter* reports_parameter =
       static_cast<const EnumListParameter*>(get_source_report_params[1]);