Fix up TODO: c++0x, update cpplint.

Needed to update cpplint to handle const auto.

Fixed a few cpplint errors that were being missed before.

Replaced most of the TODO c++0x with ranged based loops. Loops which
do not have a descriptive container name have a concrete type instead
of auto.

Change-Id: Id7cc0f27030f56057c544e94277300b3f298c9c5
diff --git a/compiler/utils/assembler.h b/compiler/utils/assembler.h
index 9d79002..c9be4ed 100644
--- a/compiler/utils/assembler.h
+++ b/compiler/utils/assembler.h
@@ -137,6 +137,7 @@
   // Next in linked list of slow paths
   SlowPath *next_;
 
+ private:
   friend class AssemblerBuffer;
   DISALLOW_COPY_AND_ASSIGN(SlowPath);
 };