Rename 'dart:debugger' to 'dart:developer'

runtime/vm/debugger.cc

Index: runtime/vm/debugger.cc
diff --git a/runtime/vm/debugger.cc b/runtime/vm/debugger.cc
index a33a3047b56ef264afea29f564ebed5bd11d5b6f..4650eacc5be46db9676e8f9ab27ebfb038833fa2 100644
--- a/runtime/vm/debugger.cc
+++ b/runtime/vm/debugger.cc
@@ -2275,7 +2275,7 @@ void Debugger::SignalBpReached() {
 }
 
 
-void Debugger::BreakHere() {
+void Debugger::BreakHere(const String& msg) {
   // We ignore this breakpoint when the VM is executing code invoked
   // by the debugger to evaluate variables values, or when we see a nested
   // breakpoint or exception event.
@@ -2288,6 +2288,8 @@ void Debugger::BreakHere() {
   ASSERT(stack_trace_ == NULL);
   stack_trace_ = stack_trace;
 
+  // TODO(johnmccutchan): Send |msg| to Observatory.
+
   // We are in the native call to Debugger_breakHere or Debugger_breakHereIf,
   // the developer gets a better experience by not seeing this call. To
   // accomplish this, we continue execution until the call exits (step out).