Revert[2] of guard to remove DrawBitmapRectFlags

This reverts commit 91110195a2eee170c11885da9d16f94b00a39f87.

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1240753003
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 403a12d..5704358 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1853,6 +1853,12 @@
     this->onDrawImageRect(image, src, dst, paint SRC_RECT_CONSTRAINT_ARG(constraint));
 }
 
+void SkCanvas::drawImageRect(const SkImage* image, const SkIRect& isrc, const SkRect& dst,
+                             const SkPaint* paint, SrcRectConstraint constraint) {
+    SkRect src = SkRect::Make(isrc);
+    this->drawImageRect(image, &src, dst, paint, constraint);
+}
+
 void SkCanvas::drawImageNine(const SkImage* image, const SkIRect& center, const SkRect& dst,
                              const SkPaint* paint) {
     if (dst.isEmpty()) {
@@ -1871,6 +1877,7 @@
     this->onDrawBitmap(bitmap, dx, dy, paint);
 }
 
+#ifdef SK_SUPPORT_LEGACY_DRAWBITMAPRECTFLAGS_TYPE
 void SkCanvas::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, const SkRect& dst,
                                     const SkPaint* paint, DrawBitmapRectFlags flags) {
     if (bitmap.drawsNothing() || dst.isEmpty()) {
@@ -1878,6 +1885,7 @@
     }
     this->onDrawBitmapRect(bitmap, src, dst, paint, (SK_VIRTUAL_CONSTRAINT_TYPE)flags);
 }
+#endif
 
 void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkRect* src, const SkRect& dst,
                               const SkPaint* paint, SrcRectConstraint constraint) {
@@ -1887,6 +1895,12 @@
     this->onDrawBitmapRect(bitmap, src, dst, paint, (SK_VIRTUAL_CONSTRAINT_TYPE)constraint);
 }
 
+void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect& isrc, const SkRect& dst,
+                              const SkPaint* paint, SrcRectConstraint constraint) {
+    SkRect src = SkRect::Make(isrc);
+    this->drawBitmapRect(bitmap, &src, dst, paint, constraint);
+}
+
 void SkCanvas::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, const SkRect& dst,
                               const SkPaint* paint) {
     if (bitmap.drawsNothing() || dst.isEmpty()) {