More profiler driven tweaks.

Make more code inlinable by moving to header files.
Use reserve on std::vectors to avoid reallocation.

Change-Id: I1bf67d32dd58ff5c06dec73a247fadc3de593e91
diff --git a/src/compiler/driver/compiler_driver.cc b/src/compiler/driver/compiler_driver.cc
index cc65cbe..6feda17 100644
--- a/src/compiler/driver/compiler_driver.cc
+++ b/src/compiler/driver/compiler_driver.cc
@@ -34,7 +34,7 @@
 #include "gc/space.h"
 #include "mirror/class_loader.h"
 #include "mirror/class-inl.h"
-#include "mirror/dex_cache.h"
+#include "mirror/dex_cache-inl.h"
 #include "mirror/field-inl.h"
 #include "mirror/abstract_method-inl.h"
 #include "mirror/object-inl.h"