Revert 5213. WK r126226 has landed in Chromium and the workaround is no longer necessary.

git-svn-id: http://skia.googlecode.com/svn/trunk@5223 2bbb7eff-a529-9590-31e7-b0007b416f81

src/gpu/SkGpuDevice.cpp

@@ -262,9 +262,6 @@ SkGpuDevice::SkGpuDevice(GrContext* context,
 }
 
 SkGpuDevice::~SkGpuDevice() {
-    // FIXME: This flush should be removed after CSS filters in WebKit flush their SkCanvas
-    fContext->flush();
-
     if (fDrawProcs) {
         delete fDrawProcs;
     }