Yet more timing logger cleanup

Some cleanup of timing logger placement, additional systrace placement for
threaded compilation work, tweaking/hiding of some type names per previous
review comments.

Change-Id: Ic7db2e02747282ac7f474b9a060df9803bfdfa5e
diff --git a/runtime/base/timing_logger.cc b/runtime/base/timing_logger.cc
index 1dcad0e..11dc542 100644
--- a/runtime/base/timing_logger.cc
+++ b/runtime/base/timing_logger.cc
@@ -77,7 +77,7 @@
 void CumulativeLogger::AddLogger(const base::TimingLogger &logger) {
   MutexLock mu(Thread::Current(), lock_);
   const base::TimingLogger::SplitTimings& splits = logger.GetSplits();
-  for (base::TimingLogger::SplitsIterator it = splits.begin(), end = splits.end();
+  for (base::TimingLogger::SplitTimingsIterator it = splits.begin(), end = splits.end();
        it != end; ++it) {
     base::TimingLogger::SplitTiming split = *it;
     uint64_t split_time = split.first;
@@ -155,7 +155,7 @@
 
 uint64_t TimingLogger::GetTotalNs() const {
   uint64_t total_ns = 0;
-  for (base::TimingLogger::SplitsIterator it = splits_.begin(), end = splits_.end();
+  for (base::TimingLogger::SplitTimingsIterator it = splits_.begin(), end = splits_.end();
        it != end; ++it) {
     base::TimingLogger::SplitTiming split = *it;
     total_ns += split.first;
@@ -166,7 +166,7 @@
 void TimingLogger::Dump(std::ostream &os) const {
   uint64_t longest_split = 0;
   uint64_t total_ns = 0;
-  for (base::TimingLogger::SplitsIterator it = splits_.begin(), end = splits_.end();
+  for (base::TimingLogger::SplitTimingsIterator it = splits_.begin(), end = splits_.end();
        it != end; ++it) {
     base::TimingLogger::SplitTiming split = *it;
     uint64_t split_time = split.first;
@@ -177,7 +177,7 @@
   TimeUnit tu = GetAppropriateTimeUnit(longest_split);
   uint64_t divisor = GetNsToTimeUnitDivisor(tu);
   // Print formatted splits.
-  for (base::TimingLogger::SplitsIterator it = splits_.begin(), end = splits_.end();
+  for (base::TimingLogger::SplitTimingsIterator it = splits_.begin(), end = splits_.end();
        it != end; ++it) {
     base::TimingLogger::SplitTiming split = *it;
     uint64_t split_time = split.first;