HBitmap can't be immutable

cc/test/fake_content_layer_client.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_content_layer_client.h"
 
 #include <stddef.h>
 
 #include "cc/playback/clip_display_item.h"
 #include "cc/playback/display_item_list_settings.h"
@@ skipping 17 matching lines @@
     : image(skia::SharePtr(img)), transform(transform), paint(paint) {}
 
 FakeContentLayerClient::ImageData::~ImageData() {}
 
 FakeContentLayerClient::FakeContentLayerClient()
     : display_list_use_cached_picture_(true),
       fill_with_nonsolid_color_(false),
       last_canvas_(nullptr),
       last_painting_control_(PAINTING_BEHAVIOR_NORMAL),
       reported_memory_usage_(0),
-      bounds_set_(false) {}
+      bounds_set_(false),
+      delegate_(nullptr) {}
 
 FakeContentLayerClient::~FakeContentLayerClient() {
 }
 
 gfx::Rect FakeContentLayerClient::PaintableRegion() {
   CHECK(bounds_set_);
   return gfx::Rect(bounds_);
 }
 
 scoped_refptr<DisplayItemList>
@@ skipping 46 matching lines @@
       paint.setColor(red ? SK_ColorRED : SK_ColorBLUE);
       canvas =
           skia::SharePtr(recorder.beginRecording(gfx::RectToSkRect(draw_rect)));
       canvas->drawIRect(gfx::RectToSkIRect(draw_rect), paint);
       display_list->CreateAndAppendItem<DrawingDisplayItem>(
           draw_rect, skia::AdoptRef(recorder.endRecordingAsPicture()));
       draw_rect.Inset(1, 1);
     }
   }
 
+  if (delegate_) {
+    canvas =
+      skia::SharePtr(recorder.beginRecording(
+          gfx::RectToSkRect(PaintableRegion())));
+    delegate_->OnPaint(canvas.get(), PaintableRegion());
+    display_list->CreateAndAppendItem<DrawingDisplayItem>(
+        PaintableRegion(), skia::AdoptRef(recorder.endRecordingAsPicture()));
+  }
 
   display_list->Finalize();
   return display_list;
 }
 
 bool FakeContentLayerClient::FillsBoundsCompletely() const { return false; }
 
 size_t FakeContentLayerClient::GetApproximateUnsharedMemoryUsage() const {
   return reported_memory_usage_;
 }
 
 }  // namespace cc