[tracing] Add names to memory-infra dumpers for debugging

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 a6a3b41e1ea82f972bc664f810a7839a04f3df65..d939eea3cef93ec13f76f2cbd59b31f90a7c8231 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -150,20 +150,23 @@ void MemoryDumpManager::Initialize(MemoryDumpManagerDelegate* delegate,
 
 // Enable the core dump providers.
 #if !defined(OS_NACL)
-  RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance());
+  RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance(),
+                       "ProcessMemoryTotals", nullptr);
 #endif
 
 #if defined(OS_LINUX) || defined(OS_ANDROID)
-  RegisterDumpProvider(ProcessMemoryMapsDumpProvider::GetInstance());
-  RegisterDumpProvider(MallocDumpProvider::GetInstance());
+  RegisterDumpProvider(ProcessMemoryMapsDumpProvider::GetInstance(),
+                       "ProcessMemoryMaps", nullptr);
+  RegisterDumpProvider(MallocDumpProvider::GetInstance(), "Malloc", nullptr);
 #endif
 
 #if defined(OS_ANDROID)
-  RegisterDumpProvider(JavaHeapDumpProvider::GetInstance());
+  RegisterDumpProvider(JavaHeapDumpProvider::GetInstance(), "JavaHeap",
+                       nullptr);
 #endif
 
 #if defined(OS_WIN)
-  RegisterDumpProvider(WinHeapDumpProvider::GetInstance());
+  RegisterDumpProvider(WinHeapDumpProvider::GetInstance(), "WinHeap", nullptr);
 #endif
 
   // If tracing was enabled before initializing MemoryDumpManager, we missed the
@@ -199,16 +202,6 @@ void MemoryDumpManager::RegisterDumpProvider(
     mdp->OnHeapProfilingEnabled(true);
 }
 
-void MemoryDumpManager::RegisterDumpProvider(
-    MemoryDumpProvider* mdp,
-    const scoped_refptr<SingleThreadTaskRunner>& task_runner) {
-  RegisterDumpProvider(mdp, "unknown", task_runner);
-}
-
-void MemoryDumpManager::RegisterDumpProvider(MemoryDumpProvider* mdp) {
-  RegisterDumpProvider(mdp, nullptr);
-}
-
 void MemoryDumpManager::UnregisterDumpProvider(MemoryDumpProvider* mdp) {
   AutoLock lock(lock_);