Trace some interesting events

Bug: 18337099
Change-Id: Ie2e60da2b9f06e0368061c944d8123ab6903355c
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 952f739..6453206 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -66,6 +66,8 @@
 bool Caches::init() {
     if (mInitialized) return false;
 
+    ATRACE_NAME("Caches::init");
+
     glGenBuffers(1, &meshBuffer);
     glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
     glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);