[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

base/trace_event/java_heap_dump_provider_android.cc

Index: base/trace_event/java_heap_dump_provider_android.cc
diff --git a/base/trace_event/java_heap_dump_provider_android.cc b/base/trace_event/java_heap_dump_provider_android.cc
index 4f5986d92ceb8ddf8f026c6d09336ba2a539a4f9..684f7301cfb1bd102bdeedc8565159a7408b2a67 100644
--- a/base/trace_event/java_heap_dump_provider_android.cc
+++ b/base/trace_event/java_heap_dump_provider_android.cc
@@ -24,7 +24,8 @@ JavaHeapDumpProvider::~JavaHeapDumpProvider() {
 
 // Called at trace dump point time. Creates a snapshot with the memory counters
 // for the current process.
-bool JavaHeapDumpProvider::OnMemoryDump(ProcessMemoryDump* pmd) {
+bool JavaHeapDumpProvider::OnMemoryDump(const MemoryDumpArgs& args,
+                                        ProcessMemoryDump* pmd) {
   // These numbers come from java.lang.Runtime stats.
   long total_heap_size = 0;
   long free_heap_size = 0;