Remove forced inlines within the proto decoder

These proto decoder methods are used within ParseFromArray in every
Perfetto protobuf. Together they are 150+ lines of code which becomes
70KB of binary size when compiled. ddiproietto@'s benchmark showed no
noticable performance drop without the inlining.

Change-Id: Ieaaa72318ce4367711cee8bb68d610aefdb77fbc
(cherry picked from commit 5e1db5ba320c00e80dcbeb7766e1775f243dd3a7)
Merged-In: Ieaaa72318ce4367711cee8bb68d610aefdb77fbc
diff --git a/src/protozero/proto_decoder.cc b/src/protozero/proto_decoder.cc
index a766a28..0595c1f 100644
--- a/src/protozero/proto_decoder.cc
+++ b/src/protozero/proto_decoder.cc
@@ -46,8 +46,8 @@
 
 // Parses one field and returns the field itself and a pointer to the next
 // field to parse. If parsing fails, the returned |next| == |buffer|.
-PERFETTO_ALWAYS_INLINE ParseFieldResult
-ParseOneField(const uint8_t* const buffer, const uint8_t* const end) {
+ParseFieldResult ParseOneField(const uint8_t* const buffer,
+                               const uint8_t* const end) {
   ParseFieldResult res{ParseFieldResult::kAbort, buffer, Field{}};
 
   // The first byte of a proto field is structured as follows:
@@ -172,7 +172,6 @@
   return res;
 }
 
-PERFETTO_ALWAYS_INLINE
 Field ProtoDecoder::ReadField() {
   ParseFieldResult res;
   do {