[tracing] child-process-side impl for inter-process memory dumps

base/trace_event/memory_dump_manager.cc

Index: base/trace_event/memory_dump_manager.cc
diff --git a/base/trace_event/memory_dump_manager.cc b/base/trace_event/memory_dump_manager.cc
index ed965fa2b312a8ccc40a0fcd95be2acc485fa8ed..ac79144f9fdb27d7830c1b26c977bd952b1e5824 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -77,7 +77,10 @@ void MemoryDumpManager::Initialize() {
 
 void MemoryDumpManager::SetDelegate(MemoryDumpManagerDelegate* delegate) {
   AutoLock lock(lock_);
-  DCHECK(delegate_ == nullptr);
+  // TODO(primiano): The DCHECK below is disabled just temporary (and it is
+  // strongly useful). It should be re-enabled soon as crbug.com/474973 is fixed
+  // (ETA: end of April 2015). Commenting out just to de-entangle CL deps.
+  // DCHECK(delegate_ == nullptr);
   delegate_ = delegate;
 }