Add configurable limit to allocations in heap profiler.

base/trace_event/memory_dump_session_state.h

Index: base/trace_event/memory_dump_session_state.h
diff --git a/base/trace_event/memory_dump_session_state.h b/base/trace_event/memory_dump_session_state.h
index 7d871982e6e00229682dbf5838af8d3d9cea91ec..689b05ebb51729bfbb98202d7158fbbfc76f2a39 100644
--- a/base/trace_event/memory_dump_session_state.h
+++ b/base/trace_event/memory_dump_session_state.h
@@ -10,6 +10,7 @@
 #include "base/base_export.h"
 #include "base/trace_event/heap_profiler_stack_frame_deduplicator.h"
 #include "base/trace_event/heap_profiler_type_name_deduplicator.h"
+#include "base/trace_event/trace_config.h"
 
 namespace base {
 namespace trace_event {
@@ -39,6 +40,12 @@ class BASE_EXPORT MemoryDumpSessionState
   void SetTypeNameDeduplicator(
       std::unique_ptr<TypeNameDeduplicator> type_name_deduplicator);
 
+  TraceConfig::MemoryDumpConfig memory_dump_config() const {

[Primiano Tucci (use gerrit), 2016/04/22 14:18:29]

I'd return a const TraceConfig::MemoryDumpConfig& here. No need to return a copy

[Maria, 2016/04/25 18:37:23]

Done.

+    return memory_dump_config_;
+  }
+
+  void SetMemoryDumpConfig(TraceConfig::MemoryDumpConfig config);

[Primiano Tucci (use gerrit), 2016/04/22 14:18:29]

make the argument a const& ref so you avoid doing an extra copy just for the
method call.

[Maria, 2016/04/25 18:37:23]

Done.

+
  private:
   friend class RefCountedThreadSafe<MemoryDumpSessionState>;
   ~MemoryDumpSessionState();
@@ -50,6 +57,9 @@ class BASE_EXPORT MemoryDumpSessionState
   // Deduplicates type names in heap dumps so they can be written once when the
   // trace is finalized.
   std::unique_ptr<TypeNameDeduplicator> type_name_deduplicator_;
+
+  // A set of configurations for this session.

[Primiano Tucci (use gerrit), 2016/04/22 14:18:29]

I'd say: The memory dump config, copied at the time when the tracing session was
started.
or something similar.

[Maria, 2016/04/25 18:37:23]

Done.

+  TraceConfig::MemoryDumpConfig memory_dump_config_;
 };
 
 }  // namespace trace_event