Revert of Change clear() to respect the clip

Revert of Change clear() to respect the clip (patchset #8 id:140001 of https://codereview.chromium.org/772533004/)

Reason for revert:
failing win unittests

Original issue's description:
> Change clear() to respect the clip
> 
> patch from issue 769703002 at patchset 1 (http://crrev.com/769703002#ps1)
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/3729469d6a12266037b697c2192768545e097ab0

TBR=robertphillips@google.com,mtklein@google.com,reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

[reed2, 2014-12-03 03:12:30]

Created Revert of Change clear() to respect the clip

[commit-bot: I haz the power, 2014-12-03 03:13:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/747313004/1

[commit-bot: I haz the power, 2014-12-03 03:13:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-03 03:13:37]

Failed to apply patch for include/core/SkPicture.h:
While running git apply --index -3 -p1;
  error: patch failed: include/core/SkPicture.h:245
  Falling back to three-way merge...
  Applied patch to 'include/core/SkPicture.h' with conflicts.
  U include/core/SkPicture.h

Patch:       include/core/SkPicture.h
Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index
b3bdda1354fc9658d50e136469e5e4a7e857f694..c63a201cd880478d9f33e44e163a502ed490536e
100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -245,7 +245,7 @@
     // V34: Add SkTextBlob serialization.
     // V35: Store SkRect (rather then width & height) in header
     // V36: Remove (obsolete) alphatype from SkColorTable
-    // V37: Added shadow only option to SkDropShadowImageFilter (last version
to record CLEAR)
+    // V37: Added shadow only option to SkDropShadowImageFilter
 
     // Note: If the picture version needs to be increased then please follow
the
     // steps to generate new SKPs in (only accessible to Googlers):
http://goo.gl/qATVcw