Also push process_test when testing on Android hardware.

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
diff --git a/tools/testing/dart/test_runner.dart b/tools/testing/dart/test_runner.dart
index 7b1e5965389c7abc8ae48df392892cb83701b83c..f9d7b998686646a48055c9a790d396d8de41f1e6 100644
--- a/tools/testing/dart/test_runner.dart
+++ b/tools/testing/dart/test_runner.dart
@@ -364,12 +364,16 @@ class VmCommand extends ProcessCommand {
 
 class AdbPrecompilationCommand extends Command {
   final String precompiledRunnerFilename;
+  final String processTestFilename;
   final String precompiledTestDirectory;
   final List<String> arguments;
   final bool useBlobs;
 
   AdbPrecompilationCommand._(this.precompiledRunnerFilename,
-      this.precompiledTestDirectory, this.arguments, this.useBlobs)
+                             this.processTestFilename,
+                             this.precompiledTestDirectory,
+                             this.arguments,
+                             this.useBlobs)
       : super._("adb_precompilation");
 
   void _buildHashCode(HashCodeBuilder builder) {
@@ -698,9 +702,12 @@ class CommandBuilder {
   }
 
   AdbPrecompilationCommand getAdbPrecompiledCommand(String precompiledRunner,
-      String testDirectory, List<String> arguments, bool useBlobs) {
+                                                    String processTest,
+                                                    String testDirectory,
+                                                    List<String> arguments,
+                                                    bool useBlobs) {
     var command = new AdbPrecompilationCommand._(
-        precompiledRunner, testDirectory, arguments, useBlobs);
+        precompiledRunner, processTest, testDirectory, arguments, useBlobs);
     return _getUniqueCommand(command);
   }
 
@@ -2638,6 +2645,7 @@ class CommandExecutorImpl implements CommandExecutor {
   Future<CommandOutput> _runAdbPrecompilationCommand(
       AdbDevice device, AdbPrecompilationCommand command, int timeout) async {
     var runner = command.precompiledRunnerFilename;
+    var processTest = command.processTestFilename;
     var testdir = command.precompiledTestDirectory;
     var arguments = command.arguments;
     var devicedir = '/data/local/tmp/precompilation-testing';
@@ -2663,8 +2671,10 @@ class CommandExecutorImpl implements CommandExecutor {
     // timing).
     steps.add(() => device.runAdbCommand(
         ['push', runner, '$devicedir/dart_precompiled_runtime']));
+    steps.add(() => device.runAdbCommand(
+        ['push', processTest, '$devicedir/process_test']));
     steps.add(() => device.runAdbShellCommand(
-        ['chmod', '777', '$devicedir/dart_precompiled_runtime']));
+        ['chmod', '777', '$devicedir/dart_precompiled_runtime $devicedir/process_test']));
 
     for (var file in files) {
       steps.add(() => device