[tracing] Simplify design of MemoryAllocatorDump

base/trace_event/memory_dump_provider.cc

Index: base/trace_event/memory_dump_provider.cc
diff --git a/base/trace_event/memory_dump_provider.cc b/base/trace_event/memory_dump_provider.cc
index 205fd326e5577ba3bcf7a300b004667a203903bc..a2d38897fda52b7e90233aba5a4928ba4234471c 100644
--- a/base/trace_event/memory_dump_provider.cc
+++ b/base/trace_event/memory_dump_provider.cc
@@ -4,7 +4,6 @@
 
 #include "base/trace_event/memory_dump_provider.h"
 
-#include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 
 namespace base {
@@ -22,11 +21,11 @@ MemoryDumpProvider::~MemoryDumpProvider() {
 }
 
 void MemoryDumpProvider::DeclareAllocatorAttribute(
-    const MemoryAllocatorDeclaredAttribute& attr) {
-  DCHECK_EQ(0u, allocator_attributes_.count(attr.name))
-      << "Allocator attribute " << attr.name << " already declared for dumper "
-      << GetFriendlyName();
-  allocator_attributes_[attr.name] = attr;
+    const std::string& allocator_name,
+    const std::string& attribute_name,
+    const std::string& attribute_type) {
+  allocator_attributes_type_info_.Set(
+      allocator_name, attribute_name, attribute_type);
 }
 
 }  // namespace trace_event