Revert of rename SkCanvasDrawable to SkDrawable, and make public

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index ce99546728a09171bf57aa51cb30daadeb42ede2..055e6737a6fd5bfc48242984f6a7db7d244646d5 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -6,11 +6,11 @@
  */
 
 #include "SkCanvas.h"
+#include "SkCanvasDrawable.h"
 #include "SkCanvasPriv.h"
 #include "SkBitmapDevice.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDraw.h"
-#include "SkDrawable.h"
 #include "SkDrawFilter.h"
 #include "SkDrawLooper.h"
 #include "SkImage.h"
@@ -2293,13 +2293,13 @@
     LOOPER_END
 }
 
-void SkCanvas::drawDrawable(SkDrawable* dr) {
+void SkCanvas::EXPERIMENTAL_drawDrawable(SkCanvasDrawable* dr) {
     if (dr && !this->quickReject(dr->getBounds())) {
         this->onDrawDrawable(dr);
     }
 }
 
-void SkCanvas::onDrawDrawable(SkDrawable* dr) {
+void SkCanvas::onDrawDrawable(SkCanvasDrawable* dr) {
     dr->draw(this);
 }