Refactor read and write buffers.

Eliminates SkFlattenable{Read,Write}Buffer, promoting SkOrdered{Read,Write}Buffer
a step each in the hierarchy.

What used to be this:

SkFlattenableWriteBuffer -> SkOrderedWriteBuffer
SkFlattenableReadBuffer  -> SkOrderedReadBuffer
SkFlattenableReadBuffer  -> SkValidatingReadBuffer

is now

SkWriteBuffer
SkReadBuffer -> SkValidatingReadBuffer

Benefits:
  - code is simpler, names are less wordy
  - the generic SkFlattenableFooBuffer code in SkPaint was incorrect; removed
  - write buffers are completely devirtualized, important for record speed

This refactoring was mostly mechanical.  You aren't going to find anything
interesting in files with less than 10 lines changed.

BUG=skia:
R=reed@google.com, scroggo@google.com, djsollen@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/134163010

git-svn-id: http://skia.googlecode.com/svn/trunk@13245 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/ColorFilterTest.cpp b/tests/ColorFilterTest.cpp
index e8cf8ba..f3f6a0a 100644
--- a/tests/ColorFilterTest.cpp
+++ b/tests/ColorFilterTest.cpp
@@ -9,22 +9,22 @@
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkLumaColorFilter.h"
-#include "SkOrderedReadBuffer.h"
-#include "SkOrderedWriteBuffer.h"
+#include "SkReadBuffer.h"
+#include "SkWriteBuffer.h"
 #include "SkRandom.h"
 #include "SkXfermode.h"
 #include "Test.h"
 
 static SkColorFilter* reincarnate_colorfilter(SkFlattenable* obj) {
-    SkOrderedWriteBuffer wb;
+    SkWriteBuffer wb;
     wb.writeFlattenable(obj);
 
-    size_t size = wb.size();
+    size_t size = wb.bytesWritten();
     SkAutoSMalloc<1024> storage(size);
     // make a copy into storage
     wb.writeToMemory(storage.get());
 
-    SkOrderedReadBuffer rb(storage.get(), size);
+    SkReadBuffer rb(storage.get(), size);
     return rb.readColorFilter();
 }