style: member functions should be lower camel

Rename member functions to be lower camel instead of snake case.

Change-Id: Ib227fd3dadb6d9607290277205223a4324cd4ce5
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/pid/controller.hpp b/pid/controller.hpp
index f52c412..bf79937 100644
--- a/pid/controller.hpp
+++ b/pid/controller.hpp
@@ -7,7 +7,7 @@
 
 /*
  * Base class for controllers.  Each controller that implements this needs to
- * provide an input_proc, process, and output_proc.
+ * provide an inputProc, process, and outputProc.
  */
 class ZoneInterface;
 
@@ -15,11 +15,11 @@
 {
     virtual ~Controller() = default;
 
-    virtual float input_proc(void) = 0;
+    virtual float inputProc(void) = 0;
 
-    virtual void output_proc(float value) = 0;
+    virtual void outputProc(float value) = 0;
 
     virtual void process(void) = 0;
 
-    virtual std::string get_id(void) = 0;
+    virtual std::string getID(void) = 0;
 };