Revert "[PDF] Refactor SkPDFFont to enable font/cmap subsetting."

The PDF xref table is corrupt with this change. Revert until we figure it out.

Review URL: http://codereview.appspot.com/4803049

git-svn-id: http://skia.googlecode.com/svn/trunk@1944 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pdf/SkBitSet.cpp b/src/pdf/SkBitSet.cpp
index c7af832..f19dd69 100755
--- a/src/pdf/SkBitSet.cpp
+++ b/src/pdf/SkBitSet.cpp
@@ -73,12 +73,12 @@
     }
 }
 
-bool SkBitSet::isBitSet(int index) const {
+bool SkBitSet::isBitSet(int index) {
     uint32_t mask = 1 << (index % 32);
     return (*internalGet(index) & mask);
 }
 
-bool SkBitSet::orBits(const SkBitSet& source) {
+bool SkBitSet::orBits(SkBitSet& source) {
     if (fBitCount != source.fBitCount) {
         return false;
     }