Remove backward compatibility shims from SkStream.h.

include/core/SkStream.h

Index: include/core/SkStream.h
===================================================================
--- include/core/SkStream.h	(revision 12241)
+++ include/core/SkStream.h	(working copy)
@@ -60,22 +60,14 @@
      *  @return the actual number bytes that could be skipped.
      */
     size_t skip(size_t size) {
-        //return this->read(NULL, size);
-        //TODO: remove this old logic after updating existing implementations
-        return 0 == size ? 0 : this->read(NULL, size);
+        return this->read(NULL, size);
     }
 
     /** Returns true when all the bytes in the stream have been read.
      *  This may return true early (when there are no more bytes to be read)
      *  or late (after the first unsuccessful read).
-     *
-     *  In Progress: do not use until all implementations are updated.
-     *  TODO: after this is implemented everywhere, make pure virtual.
      */
-    virtual bool isAtEnd() const {
-        SkASSERT(false);
-        return true;
-    }
+    virtual bool isAtEnd() const = 0;
 
     int8_t   readS8();
     int16_t  readS16();
@@ -133,11 +125,7 @@
     /** Returns true if this stream can report it's total length. */
     virtual bool hasLength() const { return false; }
     /** Returns the total length of the stream. If this cannot be done, returns 0. */
-    virtual size_t getLength() const {
-        //return 0;
-        //TODO: remove the following after everyone is updated.
-        return ((SkStream*)this)->read(NULL, 0);
-    }
+    virtual size_t getLength() const { return 0; }
 
 //SkStreamMemory
     /** Returns the starting address for the data. If this cannot be done, returns NULL. */
@@ -151,11 +139,6 @@
 /** SkStreamRewindable is a SkStream for which rewind and duplicate are required. */
 class SK_API SkStreamRewindable : public SkStream {
 public:
-    //TODO: remove the following after everyone is updated (ensures new behavior on new classes).
-    virtual bool isAtEnd() const SK_OVERRIDE = 0;
-    //TODO: remove the following after everyone is updated (ensures new behavior on new classes).
-    virtual size_t getLength() const SK_OVERRIDE { return 0; }
-
     virtual bool rewind() SK_OVERRIDE = 0;
     virtual SkStreamRewindable* duplicate() const SK_OVERRIDE = 0;
 };