Only disable deferral when it is enabled

We only have to disable deferral when it is enable to avoid issues with
stack or with performance having to recreate resources and play the
matrix transformations all over again.

Bug: 1003124, 1001142, 997735
Change-Id: Ib5b60c89b1218dd50c0b97914c08ca921683435a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1808276Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Juanmi Huertas <juanmihd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697741}

third_party/blink/renderer/platform/graphics/canvas_2d_layer_bridge.cc

@@ -443,15 +443,19 @@ bool Canvas2DLayerBridge::WritePixels(const SkImageInfo& orig_info,
       return false;
   }
 
-  // WritePixels is not supported by deferral. Since we are directly rendering,
-  // we can't do deferral on top of the canvas. Disable deferral completely.
-  last_recording_ = nullptr;
-  is_deferral_enabled_ = false;
-  have_recorded_draw_commands_ = false;
-  recorder_.reset();
-  // install the current matrix/clip stack onto the immediate canvas
-  if (GetOrCreateResourceProvider()) {
-    resource_host_->RestoreCanvasMatrixClipStack(ResourceProvider()->Canvas());
+  if (is_deferral_enabled_) {
+    // WritePixels is not supported by deferral. Since we are directly
+    // rendering, we can't do deferral on top of the canvas. Disable deferral
+    // completely.
+    last_recording_ = nullptr;
+    is_deferral_enabled_ = false;
+    have_recorded_draw_commands_ = false;
+    recorder_.reset();
+    // install the current matrix/clip stack onto the immediate canvas
+    if (GetOrCreateResourceProvider()) {
+      resource_host_->RestoreCanvasMatrixClipStack(
+          ResourceProvider()->Canvas());
+    }
   }
 
   ResourceProvider()->WritePixels(orig_info, pixels, row_bytes, x, y);