support endless recorder for timeline (#47419)

packages/flutter_tools/lib/src/android/android_device.dart

@@ -582,6 +582,8 @@ class AndroidDevice extends Device {
         ...<String>['--ez', 'trace-skia', 'true'],
       if (debuggingOptions.traceSystrace)
         ...<String>['--ez', 'trace-systrace', 'true'],
+      if (debuggingOptions.endlessTraceBuffer)
+        ...<String>['--ez', 'endless-trace-buffer', 'true'],
       if (debuggingOptions.dumpSkpOnShaderCompilation)
         ...<String>['--ez', 'dump-skp-on-shader-compilation', 'true'],
       if (debuggingOptions.cacheSkSL)

packages/flutter_tools/lib/src/commands/run.dart

@@ -102,6 +102,13 @@ class RunCommand extends RunCommandBase {
         help: 'Enable tracing of Skia code. This is useful when debugging '
               'the GPU thread. By default, Flutter will not log skia code.',
       )
+      ..addFlag('endless-trace-buffer',
+        negatable: false,
+        help: 'Enable tracing to the endless tracer. This is useful when '
+              'recording huge amounts of traces. If we need to use endless buffer to '
+              'record startup traces, we can combine the ("--trace-startup"). '
+              'For exemple, flutter run --trace-startup --endless-trace-buffer. ',
+      )
       ..addFlag('trace-systrace',
         negatable: false,
         help: 'Enable tracing to the system tracer. This is only useful on '
@@ -350,6 +357,7 @@ class RunCommand extends RunCommandBase {
         skiaDeterministicRendering: boolArg('skia-deterministic-rendering'),
         traceSkia: boolArg('trace-skia'),
         traceSystrace: boolArg('trace-systrace'),
+        endlessTraceBuffer: boolArg('endless-trace-buffer'),
         dumpSkpOnShaderCompilation: dumpSkpOnShaderCompilation,
         cacheSkSL: cacheSkSL,
         deviceVmServicePort: deviceVmservicePort,

packages/flutter_tools/lib/src/device.dart

@@ -525,6 +525,7 @@ class DebuggingOptions {
     this.skiaDeterministicRendering = false,
     this.traceSkia = false,
     this.traceSystrace = false,
+    this.endlessTraceBuffer = false,
     this.dumpSkpOnShaderCompilation = false,
     this.cacheSkSL = false,
     this.useTestFonts = false,
@@ -554,6 +555,7 @@ class DebuggingOptions {
       skiaDeterministicRendering = false,
       traceSkia = false,
       traceSystrace = false,
+      endlessTraceBuffer = false,
       dumpSkpOnShaderCompilation = false,
       verboseSystemLogs = false,
       hostVmServicePort = null,
@@ -571,6 +573,7 @@ class DebuggingOptions {
   final bool skiaDeterministicRendering;
   final bool traceSkia;
   final bool traceSystrace;
+  final bool endlessTraceBuffer;
   final bool dumpSkpOnShaderCompilation;
   final bool cacheSkSL;
   final bool useTestFonts;

packages/flutter_tools/lib/src/ios/devices.dart

@@ -327,6 +327,7 @@ class IOSDevice extends Device {
       if (debuggingOptions.enableSoftwareRendering) '--enable-software-rendering',
       if (debuggingOptions.skiaDeterministicRendering) '--skia-deterministic-rendering',
       if (debuggingOptions.traceSkia) '--trace-skia',
+      if (debuggingOptions.endlessTraceBuffer) '--endless-trace-buffer',
       if (debuggingOptions.dumpSkpOnShaderCompilation) '--dump-skp-on-shader-compilation',
       if (debuggingOptions.verboseSystemLogs) '--verbose-logging',
       if (debuggingOptions.cacheSkSL) '--cache-sksl',