Add path utils, plus a test for it.

gm/image.cpp

Index: gm/image.cpp
diff --git a/gm/image.cpp b/gm/image.cpp
index 8578e510bad28478a911ef2606d04d96037df010..55b4cdbc8a7df5a576bbaa8d9fe4ecb338a5e135 100644
--- a/gm/image.cpp
+++ b/gm/image.cpp
@@ -8,8 +8,9 @@
 #include "gm.h"
 #include "SkSurface.h"
 #include "SkCanvas.h"
-#include "SkStream.h"
 #include "SkData.h"
+#include "SkOSFile.h"
+#include "SkStream.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ -30,8 +31,8 @@ static SkData* fileToData(const char path[]) {
     return SkData::NewFromMalloc(mem, size);
 }
 
-static void drawJpeg(SkCanvas* canvas, const SkISize& size) {
-    SkAutoDataUnref data(fileToData("/Users/mike/Downloads/skia.google.jpeg"));
+static void drawJpeg(SkString filename, SkCanvas* canvas, const SkISize& size) {
+    SkAutoDataUnref data(fileToData(filename.c_str()));
     SkImage* image = SkImage::NewEncodedData(data);
     if (image) {
         SkAutoCanvasRestore acr(canvas, true);
@@ -123,7 +124,9 @@ protected:
     }
 
     virtual void onDraw(SkCanvas* canvas) {
-        drawJpeg(canvas, this->getISize());
+        SkString filename = SkOSPathUtils::SkPathJoin(
+                INHERITED::gResourcePath.c_str(), "CMYK.jpg");

[scroggo, 2013/05/24 16:23:37]

Changing this file will require a rebaseline (assuming we have a checked in
expectation for this test). Should I go ahead and make the change and
rebaseline, or leave this change out?

[epoger, 2013/05/24 16:42:55]

I think your best bet is to leave this change out (add a TODO instead), since
it's separate from the main reason for your change.  I would hate for you to
have to revert this CL because of problems with this one test, etc.

[scroggo, 2013/05/24 17:36:05]

Done.

+        drawJpeg(filename, canvas, this->getISize());
 
         canvas->scale(2, 2);