Update use of SkCanvas and SkDevice to match change in Skia

skia/ext/platform_canvas_linux.cc

Index: skia/ext/platform_canvas_linux.cc
diff --git a/skia/ext/platform_canvas_linux.cc b/skia/ext/platform_canvas_linux.cc
index 109b232b55dfdfaeb48c4cc0d7d416353d628d8d..5acbd147ca29fa750a272165d57d493fed21c6e0 100644
--- a/skia/ext/platform_canvas_linux.cc
+++ b/skia/ext/platform_canvas_linux.cc
@@ -12,18 +12,15 @@
 
 namespace skia {
 
-PlatformCanvas::PlatformCanvas() : SkCanvas() {
-}
-
 PlatformCanvas::PlatformCanvas(int width, int height, bool is_opaque)
-    : SkCanvas() {
+    : SkCanvas(SkNEW(SkBitmapPlatformDeviceFactory)) {
   if (!initialize(width, height, is_opaque))
     SK_CRASH();
 }
 
 PlatformCanvas::PlatformCanvas(int width, int height, bool is_opaque,
                                uint8_t* data)
-    : SkCanvas() {
+    : SkCanvas(SkNEW(SkBitmapPlatformDeviceFactory)) {
   if (!initialize(width, height, is_opaque, data))
     SK_CRASH();
 }
@@ -50,13 +47,4 @@ void PlatformCanvas::endPlatformPaint() {
   // We don't need to do anything on Linux here.
 }
 
-SkDevice* PlatformCanvas::createDevice(SkBitmap::Config config,
-                                       int width,
-                                       int height,
-                                       bool is_opaque,
-                                       bool isForLayer) {
-  SkASSERT(config == SkBitmap::kARGB_8888_Config);
-  return BitmapPlatformDevice::Create(width, height, is_opaque);
-}
-
 }  // namespace skia