Add color space to picture image as a creation parameter

This gives a picture image a preferred "native" color space, which
facilitates caching and other things.

BUG=skia:

Change-Id: I95988c14d17f96d7d870b3d1c3b723c36e2c170d
Reviewed-on: https://skia-review.googlesource.com/6158
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/tests/SkResourceCacheTest.cpp b/tests/SkResourceCacheTest.cpp
index c8da135..ed2ff74 100644
--- a/tests/SkResourceCacheTest.cpp
+++ b/tests/SkResourceCacheTest.cpp
@@ -329,7 +329,8 @@
             SkCanvas* canvas = recorder.beginRecording(10, 10);
             canvas->clear(SK_ColorCYAN);
             return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
-                                            SkISize::Make(10, 10), nullptr, nullptr);
+                                            SkISize::Make(10, 10), nullptr, nullptr,
+                                            SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named));
         });
     }
 }