Implement the full process interface for Windows

tests/dart/src/ProcessStderrTest.dart

Index: tests/dart/src/ProcessStderrTest.dart
===================================================================
--- tests/dart/src/ProcessStderrTest.dart	(revision 380)
+++ tests/dart/src/ProcessStderrTest.dart	(working copy)
@@ -7,7 +7,7 @@
 class ProcessStderrTest {
 
   static void testExit() {
-    Process process = new Process("out/Debug_ia32/process_test",
+    Process process = new Process("Debug_ia32\\process_test.exe",
                                   const ["1", "1", "99", "0"]);
     final int BUFFERSIZE = 10;
     final int STARTCHAR = 65;
@@ -26,7 +26,7 @@
 
     void dataWritten() {
       void readData() {
-        for (int i = 0; i < BUFFERSIZE; i++) {
+        for (int i = 0; i < BUFFERSIZE - 1; i++) {
           Expect.equals(buffer[i], readBuffer[i]);
         }
         process.close();