[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

base/trace_event/malloc_dump_provider.h

Index: base/trace_event/malloc_dump_provider.h
diff --git a/base/trace_event/malloc_dump_provider.h b/base/trace_event/malloc_dump_provider.h
index 0a51ff75daafbbe5a947b2cbc9958267891e67a6..f35199937ea71954ee1793a33a3fa16601d4eb60 100644
--- a/base/trace_event/malloc_dump_provider.h
+++ b/base/trace_event/malloc_dump_provider.h
@@ -23,7 +23,8 @@ class BASE_EXPORT MallocDumpProvider : public MemoryDumpProvider {
   static MallocDumpProvider* GetInstance();
 
   // MemoryDumpProvider implementation.
-  bool OnMemoryDump(ProcessMemoryDump* pmd) override;
+  bool OnMemoryDump(const MemoryDumpArgs& args,
+                    ProcessMemoryDump* pmd) override;
 
  private:
   friend struct DefaultSingletonTraits<MallocDumpProvider>;