[Tracing] Make heap profiler type info a string

base/trace_event/memory_allocator_dump_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/trace_event/memory_allocator_dump.h"
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/memory_allocator_dump_guid.h"
 #include "base/trace_event/memory_dump_provider.h"
@@ skipping 107 matching lines @@
   const MemoryAllocatorDumpGuid guid_bar_2 = mad->guid();
   ASSERT_EQ(guid_bar, guid_bar_2);
 
   mad.reset(new MemoryAllocatorDump("baz", nullptr));
   const MemoryAllocatorDumpGuid guid_baz = mad->guid();
   ASSERT_NE(guid_bar, guid_baz);
 }
 
 TEST(MemoryAllocatorDumpTest, DumpIntoProcessMemoryDump) {
   FakeMemoryAllocatorDumpProvider fmadp;
-  ProcessMemoryDump pmd(new MemoryDumpSessionState(nullptr));
+  ProcessMemoryDump pmd(new MemoryDumpSessionState(nullptr, nullptr));
   MemoryDumpArgs dump_args = {MemoryDumpLevelOfDetail::DETAILED};
 
   fmadp.OnMemoryDump(dump_args, &pmd);
 
   ASSERT_EQ(3u, pmd.allocator_dumps().size());
 
   const MemoryAllocatorDump* root_heap =
       pmd.GetAllocatorDump("foobar_allocator");
   ASSERT_NE(nullptr, root_heap);
   EXPECT_EQ("foobar_allocator", root_heap->absolute_name());
@@ skipping 26 matching lines @@
 
   // Check that the AsValueInfo doesn't hit any DCHECK.
   scoped_refptr<TracedValue> traced_value(new TracedValue());
   pmd.AsValueInto(traced_value.get());
 }
 
 // DEATH tests are not supported in Android / iOS.
 #if !defined(NDEBUG) && !defined(OS_ANDROID) && !defined(OS_IOS)
 TEST(MemoryAllocatorDumpTest, ForbidDuplicatesDeathTest) {
   FakeMemoryAllocatorDumpProvider fmadp;
-  ProcessMemoryDump pmd(new MemoryDumpSessionState(nullptr));
+  ProcessMemoryDump pmd(new MemoryDumpSessionState(nullptr, nullptr));
   pmd.CreateAllocatorDump("foo_allocator");
   pmd.CreateAllocatorDump("bar_allocator/heap");
   ASSERT_DEATH(pmd.CreateAllocatorDump("foo_allocator"), "");
   ASSERT_DEATH(pmd.CreateAllocatorDump("bar_allocator/heap"), "");
   ASSERT_DEATH(pmd.CreateAllocatorDump(""), "");
 }
 #endif
 
 }  // namespace trace_event
 }  // namespace base