Revert of Pass clip to context (patchset #8 id:180001 of https://codereview.chromium.org/936943002/)

Reason for revert:
Strange blur problems on nexus 5

Original issue's description:
> I'd really like to land this before the branch so speedy reviews are appreciated.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/586d5d640b19860dfbbd903a5188da1bbbe87336

TBR=jvanverth@google.com,senorblanco@google.com,bsalomon@google.com,senorblanco@chromium.org,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/956083002
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 8dafcfc..a6cc4ef 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -137,7 +137,7 @@
     GrSkDrawProcs*                  fDrawProcs;
     SkAutoTUnref<const SkClipStack> fClipStack;
     SkIPoint                        fClipOrigin;
-    GrClip                          fClip;
+    GrClip                          fClipData;
     GrTextContext*                  fTextContext;
     SkSurfaceProps                  fSurfaceProps;
     GrRenderTarget*                 fRenderTarget;