Resubmit issue 2221103002 to fix the iOS build by declaring the flag in

samplecode/SampleApp.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 15 matching lines @@
 #include "SkPictureRecorder.h"
 #include "SkPM4fPriv.h"
 #include "SkStream.h"
 #include "SkSurface.h"
 #include "SkTemplates.h"
 #include "SkTSort.h"
 #include "SkTime.h"
 #include "SkTypeface.h"
 #include "SkWindow.h"
 #include "sk_tool_utils.h"
+#include "SkScan.h"
 
 #include "SkReadBuffer.h"
 #include "SkStream.h"
 
 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
 #include "SkCGUtils.h"
 #endif
 
 #if SK_SUPPORT_GPU
 #   include "gl/GrGLInterface.h"
@@ skipping 1747 matching lines @@
             if (this->sendAnimatePulse()) {
                 this->inval(nullptr);
             }
             break;
         case ' ':
             gAnimTimer.togglePauseResume();
             if (this->sendAnimatePulse()) {
                 this->inval(nullptr);
             }
             break;
+        case 'A':
+            GlobalAAConfig::getInstance().fUseAnalyticAA =
+                    !GlobalAAConfig::getInstance().fUseAnalyticAA;
+            this->inval(nullptr);
+            break;
         case 'B':
             post_event_to_sink(new SkEvent("PictFileView::toggleBBox"), curr_view(this));
             // Cannot call updateTitle() synchronously, because the toggleBBox event is still in
             // the queue.
             post_event_to_sink(new SkEvent(gUpdateWindowTitleEvtName), this);
             this->inval(nullptr);
             break;
         case 'D':
             toggleDistanceFieldFonts();
             break;
@@ skipping 574 matching lines @@
 #ifdef SK_BUILD_FOR_MAC
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }