Fix debugger build by specifying nullptr for color space.

debugger/QT/SkGLWidget.cpp

Index: debugger/QT/SkGLWidget.cpp
diff --git a/debugger/QT/SkGLWidget.cpp b/debugger/QT/SkGLWidget.cpp
index 975052f57d4f6bc63adbf5b2ce38c8fe57dfa116..5a9c3f0d17955de4221852646ca948d6376f4e74 100644
--- a/debugger/QT/SkGLWidget.cpp
+++ b/debugger/QT/SkGLWidget.cpp
@@ -62,8 +62,9 @@ void SkGLWidget::createRenderTarget() {
     desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
     sk_sp<GrRenderTarget> curRenderTarget(
             fCurContext->textureProvider()->wrapBackendRenderTarget(desc));
+    sk_sp<SkColorSpace> colorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
-    fGpuDevice.reset(SkGpuDevice::Make(std::move(curRenderTarget), &props,
+    fGpuDevice.reset(SkGpuDevice::Make(std::move(curRenderTarget), colorSpace, &props,

[Brian Osman, 2016/07/25 17:54:42]

If you want to preserve the previous behavior, you should probably just pass
nullptr here. Specifying a color space will enable some newer rendering
features.

[f(malita), 2016/07/25 17:55:46]

+1

Let's just pass nullptr.

[chrishtr, 2016/07/25 17:58:40]

Done.

                                        SkGpuDevice::kUninit_InitContents).release());
     fCanvas.reset(new SkCanvas(fGpuDevice));
 }