[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

content/common/host_discardable_shared_memory_manager.h

Index: content/common/host_discardable_shared_memory_manager.h
diff --git a/content/common/host_discardable_shared_memory_manager.h b/content/common/host_discardable_shared_memory_manager.h
index 4421a22c8abe85202458e353e8f47fd7177ee697..00ba1b51efa87144b3c2aa2aa766ed392cd9b607 100644
--- a/content/common/host_discardable_shared_memory_manager.h
+++ b/content/common/host_discardable_shared_memory_manager.h
@@ -41,7 +41,8 @@ class CONTENT_EXPORT HostDiscardableSharedMemoryManager
       size_t size) override;
 
   // Overridden from base::trace_event::MemoryDumpProvider:
-  bool OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) override;
+  bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
+                    base::trace_event::ProcessMemoryDump* pmd) override;
 
   // This allocates a discardable memory segment for |process_handle|.
   // A valid shared memory handle is returned on success.