add cross-process option to gpipe
add unittests for reader32 and writer32



git-svn-id: http://skia.googlecode.com/svn/trunk@1397 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 76f4da1..fe998ee 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1470,7 +1470,9 @@
     SimplePC controller(canvas);
     SkGPipeWriter writer;
     if (fUsePipe) {
-        canvas = writer.startRecording(&controller);
+        uint32_t flags = SkGPipeWriter::kCrossProcess_Flag;
+//        flags = 0;
+        canvas = writer.startRecording(&controller, flags);
     }
 #endif