fuchsia: base_unittests (mostly) compiling

base/trace_event/malloc_dump_provider.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/malloc_dump_provider.h"
 
 #include <stddef.h>
 
 #include <unordered_map>
 
@@ skipping 224 matching lines @@
   WinHeapMemoryDumpImpl(&main_heap_info);
   total_virtual_size =
       main_heap_info.committed_size + main_heap_info.uncommitted_size;
   // Resident size is approximated with committed heap size. Note that it is
   // possible to do this with better accuracy on windows by intersecting the
   // working set with the virtual memory ranges occuipied by the heap. It's not
   // clear that this is worth it, as it's fairly expensive to do.
   resident_size = main_heap_info.committed_size;
   allocated_objects_size = main_heap_info.allocated_size;
   allocated_objects_count = main_heap_info.block_count;
+#elif defined(OS_FUCHSIA)
+// TODO(fuchsia): Port, see https://crbug.com/706592.
 #else
   struct mallinfo info = mallinfo();
   DCHECK_GE(info.arena + info.hblkhd, info.uordblks);
 
   // In case of Android's jemalloc |arena| is 0 and the outer pages size is
   // reported by |hblkhd|. In case of dlmalloc the total is given by
   // |arena| + |hblkhd|. For more details see link: http://goo.gl/fMR8lF.
   total_virtual_size = info.arena + info.hblkhd;
   resident_size = info.uordblks;
 
@@ skipping 129 matching lines @@
       tid_dumping_heap_ == PlatformThread::CurrentId())
     return;
   AutoLock lock(allocation_register_lock_);
   if (!allocation_register_)
     return;
   allocation_register_->Remove(address);
 }
 
 }  // namespace trace_event
 }  // namespace base