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/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 53c28e4..b3632f8 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -269,7 +269,7 @@
                                    SampleWindow* win) {
 #if SK_SUPPORT_GPU
         if (IsGpuDeviceType(dType) && NULL != fCurContext) {
-            SkAutoTUnref<SkDevice> device(new SkGpuDevice(fCurContext, fCurRenderTarget));
+            SkAutoTUnref<SkBaseDevice> device(new SkGpuDevice(fCurContext, fCurRenderTarget));
             return new SkCanvas(device);
         } else
 #endif
@@ -1429,7 +1429,7 @@
     if (fRequestGrabImage) {
         fRequestGrabImage = false;
 
-        SkDevice* device = orig->getDevice();
+        SkBaseDevice* device = orig->getDevice();
         SkBitmap bmp;
         if (device->accessBitmap(false).copyTo(&bmp, SkBitmap::kARGB_8888_Config)) {
             static int gSampleGrabCounter;