New heap profiler: add support for progress reporting and control.

src/profile-generator-inl.h

Index: src/profile-generator-inl.h
diff --git a/src/profile-generator-inl.h b/src/profile-generator-inl.h
index 8b5c1e21cb6a69c679cad070ab84b09ed5476357..3df6af06f617ace0642f904c99445978239e1fc2 100644
--- a/src/profile-generator-inl.h
+++ b/src/profile-generator-inl.h
@@ -122,7 +122,7 @@ CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
 }
 
 
-inline uint64_t HeapEntry::id() {
+uint64_t HeapEntry::id() {
   union {
     Id stored_id;
     uint64_t returned_id;
@@ -146,6 +146,18 @@ void HeapEntriesMap::UpdateEntries(Visitor* visitor) {
   }
 }
 
+
+bool HeapSnapshotGenerator::ReportProgress(bool force) {
+  const int kProgressReportGranularity = 10000;
+  if (control_ != NULL
+      && (force || progress_counter_ % kProgressReportGranularity == 0)) {
+      return
+          control_->ReportProgressValue(progress_counter_, progress_total_) ==
+          v8::ActivityControl::kContinue;
+  }
+  return true;
+}
+
 } }  // namespace v8::internal
 
 #endif  // ENABLE_LOGGING_AND_PROFILING