Fix cpplint whitespace/blank_line issues

Change-Id: Ice937e95e23dd622c17054551d4ae4cebd0ef8a2
diff --git a/runtime/stack.h b/runtime/stack.h
index 0e2c4c5..99ba898 100644
--- a/runtime/stack.h
+++ b/runtime/stack.h
@@ -554,7 +554,6 @@
   static void DescribeStack(Thread* thread) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
  private:
-
   instrumentation::InstrumentationStackFrame GetInstrumentationStackFrame(uint32_t depth) const;
 
   void SanityCheckFrame() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
@@ -567,6 +566,7 @@
   size_t num_frames_;
   // Depth of the frame we're currently at.
   size_t cur_depth_;
+
  protected:
   Context* const context_;
 };
@@ -638,6 +638,7 @@
     spill_shifts--;  // wind back one as we want the last match
     return spill_shifts;
   }
+
  private:
   const uint16_t* table_;
 };