Split SkDevice into SkBaseDevice and SkBitmapDevice

https://codereview.chromium.org/22978012/



git-svn-id: http://skia.googlecode.com/svn/trunk@10995 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/MagnifierBench.cpp b/bench/MagnifierBench.cpp
index 969323a..2e937f3 100644
--- a/bench/MagnifierBench.cpp
+++ b/bench/MagnifierBench.cpp
@@ -5,8 +5,8 @@
  * found in the LICENSE file.
  */
 #include "SkBenchmark.h"
+#include "SkBitmapDevice.h"
 #include "SkCanvas.h"
-#include "SkDevice.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkRandom.h"
 
@@ -52,7 +52,7 @@
         const int h = fIsSmall ? FILTER_HEIGHT_LARGE : FILTER_HEIGHT_LARGE;
         fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, w, h);
         fCheckerboard.allocPixels();
-        SkDevice device(fCheckerboard);
+        SkBitmapDevice device(fCheckerboard);
         SkCanvas canvas(&device);
         canvas.clear(0x00000000);
         SkPaint darkPaint;