Per-closure breakpoints; restructure breakpoint implementation to keep a list of conditions.

runtime/vm/service_event.h

Index: runtime/vm/service_event.h
diff --git a/runtime/vm/service_event.h b/runtime/vm/service_event.h
index e74ee66f2929dd039c794600aba734073968312f..e089339b2dbf42b19e6e2c9424ab55e7b9be695a 100644
--- a/runtime/vm/service_event.h
+++ b/runtime/vm/service_event.h
@@ -50,10 +50,10 @@ class ServiceEvent {
 
   EventType type() const { return type_; }
 
-  SourceBreakpoint* breakpoint() const {
+  BreakpointCondition* breakpoint() const {
     return breakpoint_;
   }
-  void set_breakpoint(SourceBreakpoint* bpt) {
+  void set_breakpoint(BreakpointCondition* bpt) {
     ASSERT(type() == kPauseBreakpoint ||
            type() == kBreakpointAdded ||
            type() == kBreakpointResolved ||
@@ -103,7 +103,7 @@ class ServiceEvent {
  private:
   Isolate* isolate_;
   EventType type_;
-  SourceBreakpoint* breakpoint_;
+  BreakpointCondition* breakpoint_;
   ActivationFrame* top_frame_;
   const Object* exception_;
   const Object* inspectee_;