[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 e40d2dadf6e5dfc601cb53ab7a7c44555f8e5c57..7e992b96768b3cdcf126bf97305a881504006b29 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -150,20 +150,22 @@ void MemoryDumpManager::Initialize(MemoryDumpManagerDelegate* delegate,
 
 // Enable the core dump providers.
 #if !defined(OS_NACL)
-  RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance());
+  RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance(),
+                       "ProcessMemoryTotals");
 #endif
 
 #if defined(OS_LINUX) || defined(OS_ANDROID)
-  RegisterDumpProvider(ProcessMemoryMapsDumpProvider::GetInstance());
-  RegisterDumpProvider(MallocDumpProvider::GetInstance());
+  RegisterDumpProvider(ProcessMemoryMapsDumpProvider::GetInstance(),
+                       "ProcessMemoryMaps");
+  RegisterDumpProvider(MallocDumpProvider::GetInstance(), "Malloc");
 #endif
 
 #if defined(OS_ANDROID)
-  RegisterDumpProvider(JavaHeapDumpProvider::GetInstance());
+  RegisterDumpProvider(JavaHeapDumpProvider::GetInstance(), "JavaHeap");
 #endif
 
 #if defined(OS_WIN)
-  RegisterDumpProvider(WinHeapDumpProvider::GetInstance());
+  RegisterDumpProvider(WinHeapDumpProvider::GetInstance(), "WinHeap");
 #endif
 
   // If tracing was enabled before initializing MemoryDumpManager, we missed the
@@ -199,14 +201,9 @@ 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::RegisterDumpProvider(MemoryDumpProvider* mdp,
+                                             const char* name) {
+  RegisterDumpProvider(mdp, name, nullptr);
 }
 
 void MemoryDumpManager::UnregisterDumpProvider(MemoryDumpProvider* mdp) {