[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

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 d076dda05054ce70e2f5e009c7103d68ea03c6db..e4ed9955264109a46a29154b05a7d93515f8d005 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -311,8 +311,14 @@ void MemoryDumpManager::ContinueAsyncProcessDump(
   // Invoke the dump provider without holding the |lock_|.
   bool finalize = false;
   bool dump_successful = false;
+
+  // TODO(ssid): Change RequestGlobalDump to use MemoryDumpArgs along with
+  // MemoryDumpType to get request for light / heavy dump, and remove this
+  // constant.
   if (!skip_dump)

[petrcermak, 2015/08/03 10:12:35]

nit: I think this would be more readable with braces (given that it is a 3-line
statement.

[ssid, 2015/08/03 10:34:02]

Done.

-    dump_successful = mdp->OnMemoryDump(&pmd_async_state->process_memory_dump);
+    dump_successful =
+        mdp->OnMemoryDump(MemoryDumpArgs(MemoryDumpArgs::LEVEL_OF_DETAIL_HIGH),
+                          &pmd_async_state->process_memory_dump);
 
   {
     AutoLock lock(lock_);