[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

content/child/web_memory_dump_provider_adapter.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_
 #define CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_
 
 #include "base/macros.h"
 #include "base/trace_event/memory_dump_provider.h"
 
 namespace blink {
 class WebMemoryDumpProvider;
 }  // namespace blink
 
 namespace content {
 
 // Adapter class which makes it possible to register a WebMemoryDumpProvider (
 // from blink) to base::trace_event::MemoryDumpManager, which expects a
 // MemoryDumpProvider instead.
 // This is essentially proxying the OnMemoryDump from chromium base to blink.
 class WebMemoryDumpProviderAdapter
     : public base::trace_event::MemoryDumpProvider {
  public:
   explicit WebMemoryDumpProviderAdapter(blink::WebMemoryDumpProvider* wmdp);
   ~WebMemoryDumpProviderAdapter() override;
 
   // base::trace_event::MemoryDumpProvider implementation.
-  bool OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) override;
+  bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
+                    base::trace_event::ProcessMemoryDump* pmd) override;
 
   bool is_registered() const { return is_registered_; }
   void set_is_registered(bool is_registered) { is_registered_ = is_registered; }
 
  private:
   // The underlying WebMemoryDumpProvider instance to which the OnMemoryDump()
   // calls will be proxied to.
   blink::WebMemoryDumpProvider* web_memory_dump_provider_;  // Not owned.
 
   // True iff this has been registered with the MDM (and not unregistered yet).
   bool is_registered_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMemoryDumpProviderAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_