Use plugins for RCTScrollViewComponentView

Summary:
Use plugin architecture for `RCTScrollViewComponentView`

Changelog: [Internal]

Reviewed By: shergin

Differential Revision: D18743825

fbshipit-source-id: d25162252d2dc4ac6ee67d48394b4dfa9ad134cb

React/Fabric/Mounting/ComponentViews/RCTFabricComponentsPlugins.h

@@ -30,6 +30,7 @@ Class<RCTComponentViewProtocol> RCTFabricComponentsProvider(const char *name);
 
 // Lookup functions
 Class<RCTComponentViewProtocol> RCTSafeAreaViewCls(void) __attribute__((used));
+Class<RCTComponentViewProtocol> RCTScrollViewCls(void) __attribute__((used));
 
 #ifdef __cplusplus
 }

React/Fabric/Mounting/ComponentViews/RCTFabricComponentsPlugins.mm

@@ -19,6 +19,7 @@
 Class<RCTComponentViewProtocol> RCTFabricComponentsProvider(const char *name) {
   static std::unordered_map<std::string, Class (*)(void)> sFabricComponentsClassMap = {
     {"SafeAreaView", RCTSafeAreaViewCls},
+    {"ScrollView", RCTScrollViewCls},
   };
 
   auto p = sFabricComponentsClassMap.find(name);

React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm

@@ -20,6 +20,7 @@
 
 #import "RCTConversions.h"
 #import "RCTEnhancedScrollView.h"
+#import "RCTFabricComponentsPlugins.h"
 
 using namespace facebook::react;
 
@@ -395,3 +396,8 @@ static void RCTSendPaperScrollEvent_DEPRECATED(UIScrollView *scrollView, NSInteg
 }
 
 @end
+
+Class<RCTComponentViewProtocol> RCTScrollViewCls(void)
+{
+  return RCTScrollViewComponentView.class;
+}

React/Fabric/Mounting/RCTComponentViewFactory.mm

@@ -27,7 +27,6 @@
 #import "RCTParagraphComponentView.h"
 #import "RCTPullToRefreshViewComponentView.h"
 #import "RCTRootComponentView.h"
-#import "RCTScrollViewComponentView.h"
 #import "RCTSliderComponentView.h"
 #import "RCTSwitchComponentView.h"
 #import "RCTUnimplementedNativeComponentView.h"
@@ -50,7 +49,6 @@ using namespace facebook::react;
 
   [componentViewFactory registerComponentViewClass:[RCTViewComponentView class]];
   [componentViewFactory registerComponentViewClass:[RCTRootComponentView class]];
-  [componentViewFactory registerComponentViewClass:[RCTScrollViewComponentView class]];
   [componentViewFactory registerComponentViewClass:[RCTPullToRefreshViewComponentView class]];
   [componentViewFactory registerComponentViewClass:[RCTImageComponentView class]];
   [componentViewFactory registerComponentViewClass:[RCTParagraphComponentView class]];