Stop saying "typedef struct" and "typedef enum".

Seeing new instances of this C-ism go in makes me a sad panda.

Change-Id: Ie3dd414b8b5e57a4164e88eb2d8559545569628d
diff --git a/src/compiler/codegen/Ralloc.h b/src/compiler/codegen/Ralloc.h
index c9e5308..8c8c693 100644
--- a/src/compiler/codegen/Ralloc.h
+++ b/src/compiler/codegen/Ralloc.h
@@ -28,11 +28,11 @@
 namespace art {
 
 /* Static register use counts */
-typedef struct RefCounts {
+struct RefCounts {
     int count;
     int sReg;
     bool doubleStart;   // Starting vReg for a double
-} RefCounts;
+};
 
 
 inline int oatS2VReg(CompilationUnit* cUnit, int sReg)