bind-gen: Make some of bindings::V8SetReturnValue inline functions

Annotates some of bindings::V8SetReturnValue with 'inline' so that
the perf on Android improves.
blink_perf.bindings/node-type improves by ~7%.

Bug: 839389
Change-Id: I32162c4712d828616785747ce7f5688f5511808c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348493
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797230}

third_party/blink/renderer/platform/bindings/v8_set_return_value.h

@@ -177,7 +177,7 @@ void V8SetReturnValue(const CallbackInfo& info, double value) {
 // the IDL type because Blink is not always respectful to IDL types.  These
 // functions fix such a type mismatch.
 template <typename CallbackInfo, typename BlinkType, typename IdlType>
-typename std::enable_if_t<std::is_arithmetic<BlinkType>::value ||
+inline typename std::enable_if_t<std::is_arithmetic<BlinkType>::value ||
                                  std::is_enum<BlinkType>::value>
 V8SetReturnValue(const CallbackInfo& info,
                  BlinkType value,
@@ -186,7 +186,7 @@ V8SetReturnValue(const CallbackInfo& info,
 }
 
 template <typename CallbackInfo, typename BlinkType>
-void V8SetReturnValue(const CallbackInfo& info,
+inline void V8SetReturnValue(const CallbackInfo& info,
                              BlinkType* value,
                              V8ReturnValue::PrimitiveType<bool>) {
   V8SetReturnValue(info, bool(value));