[tracing] Fix MemoryDumpManager to support startup tracing

components/tracing/child_memory_dump_manager_delegate_impl.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 COMPONENTS_TRACING_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_
 #define COMPONENTS_TRACING_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_
 
 #include "base/trace_event/memory_dump_manager.h"
 
 #include "base/memory/ref_counted.h"
@@ skipping 15 matching lines @@
 // gracefully (and thread-safely) failures in the case of a lack of the CTMF.
 class ChildMemoryDumpManagerDelegateImpl
     : public base::trace_event::MemoryDumpManagerDelegate {
  public:
   static ChildMemoryDumpManagerDelegateImpl* GetInstance();
 
   // base::trace_event::MemoryDumpManagerDelegate implementation.
   void RequestGlobalMemoryDump(
       const base::trace_event::MemoryDumpRequestArgs& args,
       const base::trace_event::MemoryDumpCallback& callback) override;
-  bool IsCoordinatorProcess() const override;
   uint64 GetTracingProcessId() const override;
 
   void SetChildTraceMessageFilter(ChildTraceMessageFilter* ctmf);
 
   // Pass kInvalidTracingProcessId to invalidate the id.
   void set_tracing_process_id(uint64 id) {
     DCHECK_IMPLIES(
         tracing_process_id_ !=
             base::trace_event::MemoryDumpManager::kInvalidTracingProcessId,
         id == base::trace_event::MemoryDumpManager::kInvalidTracingProcessId ||
@@ skipping 20 matching lines @@
   // The unique id of the child process, created for tracing and is expected to
   // be valid only when tracing is enabled.
   uint64 tracing_process_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildMemoryDumpManagerDelegateImpl);
 };
 
 }  // namespace tracing
 
 #endif  // COMPONENTS_TRACING_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_