rename blitrow::proc and add (uncalled) hook for colorproc16

src/opts/SkBlitRow_opts_arm.cpp

Index: src/opts/SkBlitRow_opts_arm.cpp
diff --git a/src/opts/SkBlitRow_opts_arm.cpp b/src/opts/SkBlitRow_opts_arm.cpp
index 473a3e91b189ba1d6c9f738f4048b50644e47a5e..9a8cfc4b774f441a5473ae30f51045a2c835a51d 100644
--- a/src/opts/SkBlitRow_opts_arm.cpp
+++ b/src/opts/SkBlitRow_opts_arm.cpp
@@ -347,7 +347,7 @@ void S32A_Blend_BlitRow32_arm(SkPMColor* SK_RESTRICT dst,
 
 ///////////////////////////////////////////////////////////////////////////////
 
-static const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm[] = {
+static const SkBlitRow::Proc16 sk_blitrow_platform_565_procs_arm[] = {
     // no dither
     // NOTE: For the functions below, we don't have a special version
     //       that assumes that each source pixel is opaque. But our S32A is
@@ -373,10 +373,14 @@ static const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm[] = {
 
 #endif // USE_ARM_CODE
 
-SkBlitRow::Proc SkBlitRow::PlatformProcs565(unsigned flags) {
+SkBlitRow::Proc16 SkBlitRow::PlatformFactory565(unsigned flags) {
     return SK_ARM_NEON_WRAP(sk_blitrow_platform_565_procs_arm)[flags];
 }
 
+SkBlitRow::ColorProc16 SkBlitRow::PlatformColorFactory565(unsigned flags) {
+    return NULL;
+}
+
 SkBlitRow::Proc32 SkBlitRow::PlatformProcs32(unsigned flags) {
     return SK_ARM_NEON_WRAP(sk_blitrow_platform_32_procs_arm)[flags];
 }