Revert "Change clear() to respect the clip"

src/core/SkBitmapDevice.cpp

Index: src/core/SkBitmapDevice.cpp
diff --git a/src/core/SkBitmapDevice.cpp b/src/core/SkBitmapDevice.cpp
index 020f1da13b2faba3910d303479e5b5d0d9754c5f..9df7c9b65584ad3a56a3e077beb03f80451697e3 100644
--- a/src/core/SkBitmapDevice.cpp
+++ b/src/core/SkBitmapDevice.cpp
@@ -127,6 +127,10 @@ void SkBitmapDevice::unlockPixels() {
     }
 }
 
+void SkBitmapDevice::clear(SkColor color) {
+    fBitmap.eraseColor(color);
+}
+
 const SkBitmap& SkBitmapDevice::onAccessBitmap() {
     return fBitmap;
 }