Revert of Revert of Add compressed texture capabilities for GPU devices
(https://codereview.chromium.org/307543002/)

Reason for revert:
Re-landing the original CL, because the revert didn't fix things.  See http://skbug.com/2608 ('RunDecodingTests failing on multiple platforms')

Original issue's description:
> Revert of Add compressed texture capabilities for GPU devices (https://codereview.chromium.org/292323003/)
>
> Reason for revert:
> RunDecodingTests failing on multiple platforms.  Please use trybots to validate and re-land.
>
> Original issue's description:
> > Add compressed texture capabilities for GPU devices
> >
> > BUG=skia:
> >
> > Committed: http://code.google.com/p/skia/source/detail?r=14880
> >
> > Committed: http://code.google.com/p/skia/source/detail?r=14901
>
> TBR=bsalomon@google.com,robertphillips@google.com,krajcevski@google.com
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14902

R=bsalomon@google.com, robertphillips@google.com, krajcevski@google.com
TBR=bsalomon@google.com, krajcevski@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: epoger@google.com

Review URL: https://codereview.chromium.org/302553008

git-svn-id: http://skia.googlecode.com/svn/trunk@14903 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrDrawTargetCaps.h b/src/gpu/GrDrawTargetCaps.h
index 648b5c3..db2b090 100644
--- a/src/gpu/GrDrawTargetCaps.h
+++ b/src/gpu/GrDrawTargetCaps.h
@@ -72,6 +72,11 @@
         return fConfigRenderSupport[config][withMSAA];
     }
 
+    bool compressedTextureSupport(GrCompressedFormat format) const {
+        SkASSERT(kGrCompressedFormatCount > format);
+        return fCompressedFormatSupport[format];
+    }
+
 protected:
     bool f8BitPaletteSupport        : 1;
     bool fNPOTTextureTileSupport    : 1;
@@ -97,6 +102,8 @@
     // The first entry for each config is without msaa and the second is with.
     bool fConfigRenderSupport[kGrPixelConfigCnt][2];
 
+    bool fCompressedFormatSupport[kGrCompressedFormatCount];
+
     typedef SkRefCnt INHERITED;
 };