[tracing] Introduce "allowed_dump_modes" for memory dump config

content/browser/tracing/tracing_controller_impl.cc

 // Copyright (c) 2013 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.
 #include "content/browser/tracing/tracing_controller_impl.h"
 
 #include "base/bind.h"
 #include "base/cpu.h"
 #include "base/files/file_util.h"
 #include "base/guid.h"
 #include "base/json/string_escape.h"
@@ skipping 895 matching lines @@
   // Stop tracing only if all agents report back.
   if(--pending_clock_sync_ack_count_ == 0) {
     clock_sync_timer_.Stop();
     StopTracingAfterClockSync();
   }
 }
 
 void TracingControllerImpl::RequestGlobalMemoryDump(
     const base::trace_event::MemoryDumpRequestArgs& args,
     const base::trace_event::MemoryDumpCallback& callback) {
+  if (!base::trace_event::MemoryDumpManager::GetInstance()->IsDumpModeAllowed(
+          args.level_of_detail))
+    return;
+
   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&TracingControllerImpl::RequestGlobalMemoryDump,
                    base::Unretained(this), args, callback));
     return;
   }
   // Abort if another dump is already in progress.
   if (pending_memory_dump_guid_) {
     DVLOG(1) << "Requested memory dump " << args.dump_guid
@@ skipping 100 matching lines @@
   const bool global_success = failed_memory_dump_count_ == 0;
   if (!pending_memory_dump_callback_.is_null()) {
     pending_memory_dump_callback_.Run(pending_memory_dump_guid_,
                                       global_success);
     pending_memory_dump_callback_.Reset();
   }
   pending_memory_dump_guid_ = 0;
 }
 
 }  // namespace content