In gm, install drawFilter for pipe and tiledPipe.

Fixes bugs in drawing un-antialiased text in gm.

Review URL: https://codereview.chromium.org/12812016

git-svn-id: http://skia.googlecode.com/svn/trunk@8173 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index 30e9296..0ac8f8f 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -901,6 +901,7 @@
             SkISize size = gm->getISize();
             setup_bitmap(gRec, size, &bitmap);
             SkCanvas canvas(bitmap);
+            installFilter(&canvas);
             PipeController pipeController(&canvas);
             SkGPipeWriter writer;
             SkCanvas* pipeCanvas = writer.startRecording(
@@ -927,6 +928,7 @@
             SkISize size = gm->getISize();
             setup_bitmap(gRec, size, &bitmap);
             SkCanvas canvas(bitmap);
+            installFilter(&canvas);
             TiledPipeController pipeController(bitmap);
             SkGPipeWriter writer;
             SkCanvas* pipeCanvas = writer.startRecording(