Wire up support for --skia-deterministic-rendering (#14802) https://github.com/flutter/flutter/issues/14519

diff --git a/packages/flutter_tools/lib/src/android/android_device.dart b/packages/flutter_tools/lib/src/android/android_device.dart
index aa93628..f2779f3 100644
--- a/packages/flutter_tools/lib/src/android/android_device.dart
+++ b/packages/flutter_tools/lib/src/android/android_device.dart

@@ -420,6 +420,8 @@
       cmd.addAll(<String>['--es', 'route', route]);
     if (debuggingOptions.enableSoftwareRendering)
       cmd.addAll(<String>['--ez', 'enable-software-rendering', 'true']);
+    if (debuggingOptions.skiaDeterministicRendering)
+      cmd.addAll(<String>['--ez', 'skia-deterministic-rendering', 'true']);
     if (debuggingOptions.traceSkia)
       cmd.addAll(<String>['--ez', 'trace-skia', 'true']);
     if (debuggingOptions.debuggingEnabled) {

diff --git a/packages/flutter_tools/lib/src/commands/run.dart b/packages/flutter_tools/lib/src/commands/run.dart
index 30809bb..5397f6d 100644
--- a/packages/flutter_tools/lib/src/commands/run.dart
+++ b/packages/flutter_tools/lib/src/commands/run.dart

@@ -90,6 +90,10 @@
               'when testing Flutter on emulators. By default, Flutter will\n'
               'attempt to either use OpenGL or Vulkan and fall back to software\n'
               'when neither is available.');
+    argParser.addFlag('skia-deterministic-rendering',
+        negatable: false,
+        help: 'When combined with --enable-software-rendering, provides 100%\n'
+              'deterministic Skia rendering.');
     argParser.addFlag('trace-skia',
         negatable: false,
         help: 'Enable tracing of Skia code. This is useful when debugging\n'
@@ -229,6 +233,7 @@
         startPaused: argResults['start-paused'],
         useTestFonts: argResults['use-test-fonts'],
         enableSoftwareRendering: argResults['enable-software-rendering'],
+        skiaDeterministicRendering: argResults['skia-deterministic-rendering'],
         traceSkia: argResults['trace-skia'],
         observatoryPort: observatoryPort,
       );

diff --git a/packages/flutter_tools/lib/src/device.dart b/packages/flutter_tools/lib/src/device.dart
index 0fcee66..0adeb37 100644
--- a/packages/flutter_tools/lib/src/device.dart
+++ b/packages/flutter_tools/lib/src/device.dart

@@ -320,6 +320,7 @@
   DebuggingOptions.enabled(this.buildInfo, {
     this.startPaused: false,
     this.enableSoftwareRendering: false,
+    this.skiaDeterministicRendering: false,
     this.traceSkia: false,
     this.useTestFonts: false,
     this.observatoryPort,
@@ -330,6 +331,7 @@
     useTestFonts = false,
     startPaused = false,
     enableSoftwareRendering = false,
+    skiaDeterministicRendering = false,
     traceSkia = false,
     observatoryPort = null;
 
@@ -338,6 +340,7 @@
   final BuildInfo buildInfo;
   final bool startPaused;
   final bool enableSoftwareRendering;
+  final bool skiaDeterministicRendering;
   final bool traceSkia;
   final bool useTestFonts;
   final int observatoryPort;

diff --git a/packages/flutter_tools/lib/src/ios/devices.dart b/packages/flutter_tools/lib/src/ios/devices.dart
index 9aa78da..9fd3505 100644
--- a/packages/flutter_tools/lib/src/ios/devices.dart
+++ b/packages/flutter_tools/lib/src/ios/devices.dart

@@ -210,6 +210,9 @@
     if (debuggingOptions.enableSoftwareRendering)
       launchArguments.add('--enable-software-rendering');
 
+    if (debuggingOptions.skiaDeterministicRendering)
+      launchArguments.add('--skia-deterministic-rendering');
+
     if (debuggingOptions.traceSkia)
       launchArguments.add('--trace-skia');
 

diff --git a/packages/flutter_tools/lib/src/ios/simulators.dart b/packages/flutter_tools/lib/src/ios/simulators.dart
index 86452b2..f9d5b22 100644
--- a/packages/flutter_tools/lib/src/ios/simulators.dart
+++ b/packages/flutter_tools/lib/src/ios/simulators.dart

@@ -332,6 +332,8 @@
         args.add('--enable-checked-mode');
       if (debuggingOptions.startPaused)
         args.add('--start-paused');
+      if (debuggingOptions.skiaDeterministicRendering)
+        args.add('--skia-deterministic-rendering');
       if (debuggingOptions.useTestFonts)
         args.add('--use-test-fonts');