Support Xcode projects with no schemes (#11750)

dev/integration_tests/flavors/ios/Runner.xcodeproj/project.pbxproj

@@ -317,7 +317,6 @@
 			buildSettings = {
 				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = AQ7UHDBEXJ;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -383,7 +382,6 @@
 			buildSettings = {
 				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = AQ7UHDBEXJ;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -498,7 +496,6 @@
 			buildSettings = {
 				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = AQ7UHDBEXJ;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -521,7 +518,6 @@
 			buildSettings = {
 				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = AQ7UHDBEXJ;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",

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

@@ -294,7 +294,6 @@ Future<XcodeBuildResult> buildXcodeProject({
     'clean',
     'build',
     '-configuration', configuration,
-    '-scheme', scheme,
     'ONLY_ACTIVE_ARCH=YES',
   ];
 
@@ -306,6 +305,7 @@ Future<XcodeBuildResult> buildXcodeProject({
     if (fs.path.extension(entity.path) == '.xcworkspace') {
       commands.addAll(<String>[
         '-workspace', fs.path.basename(entity.path),
+        '-scheme', scheme,
         "BUILD_DIR=${fs.path.absolute(getIosBuildDirectory())}",
       ]);
       break;

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

@@ -119,6 +119,8 @@ class XcodeProjectInfo {
       }
       collector?.add(line.trim());
     }
+    if (schemes.isEmpty)
+      schemes.add('Runner');
     return new XcodeProjectInfo(targets, buildConfigurations, schemes);
   }