memory-infra: Move dump level check to observer and rename session state

base/trace_event/process_memory_dump.h

Index: base/trace_event/process_memory_dump.h
diff --git a/base/trace_event/process_memory_dump.h b/base/trace_event/process_memory_dump.h
index 5a0f4c5aca9e8c6a9579e98c0d01c48ed0e48a9e..b16930fa6c29138a2ef150705c653ca1af480eeb 100644
--- a/base/trace_event/process_memory_dump.h
+++ b/base/trace_event/process_memory_dump.h
@@ -14,10 +14,10 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
+#include "base/trace_event/heap_profiler_serialization_state.h"
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_allocator_dump_guid.h"
 #include "base/trace_event/memory_dump_request_args.h"
-#include "base/trace_event/memory_dump_session_state.h"
 #include "base/trace_event/process_memory_maps.h"
 #include "base/trace_event/process_memory_totals.h"
 #include "build/build_config.h"
@@ -31,7 +31,7 @@
 namespace base {
 namespace trace_event {
 
-class MemoryDumpSessionState;
+class HeapProfilerSerializationState;
 class TracedValue;
 
 // ProcessMemoryDump is as a strongly typed container which holds the dumps
@@ -67,7 +67,8 @@ class BASE_EXPORT ProcessMemoryDump {
   static size_t CountResidentBytes(void* start_address, size_t mapped_size);
 #endif
 
-  ProcessMemoryDump(scoped_refptr<MemoryDumpSessionState> session_state,
+  ProcessMemoryDump(scoped_refptr<HeapProfilerSerializationState>
+                        heap_profiler_serialization_state,
                     const MemoryDumpArgs& dump_args);
   ~ProcessMemoryDump();
 
@@ -148,8 +149,9 @@ class BASE_EXPORT ProcessMemoryDump {
   void AddSuballocation(const MemoryAllocatorDumpGuid& source,
                         const std::string& target_node_name);
 
-  const scoped_refptr<MemoryDumpSessionState>& session_state() const {
-    return session_state_;
+  const scoped_refptr<HeapProfilerSerializationState>&
+  heap_profiler_serialization_state() const {
+    return heap_profiler_serialization_state_;
   }
 
   // Removes all the MemoryAllocatorDump(s) contained in this instance. This
@@ -198,7 +200,8 @@ class BASE_EXPORT ProcessMemoryDump {
   HeapDumpsMap heap_dumps_;
 
   // State shared among all PMDs instances created in a given trace session.
-  scoped_refptr<MemoryDumpSessionState> session_state_;
+  scoped_refptr<HeapProfilerSerializationState>
+      heap_profiler_serialization_state_;
 
   // Keeps track of relationships between MemoryAllocatorDump(s).
   std::vector<MemoryAllocatorDumpEdge> allocator_dumps_edges_;