[tracing] Add memory dump config to TraceConfig

base/trace_event/memory_dump_manager_unittest.cc

Index: base/trace_event/memory_dump_manager_unittest.cc
diff --git a/base/trace_event/memory_dump_manager_unittest.cc b/base/trace_event/memory_dump_manager_unittest.cc
index 9835415f4e7ff0305c5c08d7a1a41e5aaab413c9..38bc0ac35d3deaef6093a6406cc890bda3d93b23 100644
--- a/base/trace_event/memory_dump_manager_unittest.cc
+++ b/base/trace_event/memory_dump_manager_unittest.cc
@@ -70,7 +70,7 @@ class MemoryDumpManagerTest : public testing::Test {
   }
 
  protected:
-  const char* kTraceCategory = MemoryDumpManager::kTraceCategoryForTesting;
+  const char* kTraceCategory = MemoryDumpManager::kTraceCategory;

[Primiano Tucci (use gerrit), 2015/08/24 11:58:35]

At this point this level of indirection is not needed anymore, as test fixtures
can access kTraceCategory themselves.

i.e. EnableTracing(MemoryDumpManager::kTraceCategory)

[ssid, 2015/08/24 15:29:30]

Done.

 
   void EnableTracing(const char* category) {
     TraceLog::GetInstance()->SetEnabled(