tryAllocPixels returns bool, allocPixels requires success

cc/resources/bitmap_content_layer_updater.cc

 // Copyright 2011 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/resources/bitmap_content_layer_updater.h"
 
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
 #include "cc/resources/prioritized_resource.h"
@@ skipping 46 matching lines @@
 void BitmapContentLayerUpdater::PrepareToUpdate(
     const gfx::Rect& content_rect,
     const gfx::Size& tile_size,
     float contents_width_scale,
     float contents_height_scale,
     gfx::Rect* resulting_opaque_rect) {
   if (canvas_size_ != content_rect.size()) {
     devtools_instrumentation::ScopedLayerTask paint_setup(
         devtools_instrumentation::kPaintSetup, layer_id_);
     canvas_size_ = content_rect.size();
-    bool alloc = bitmap_backing_.allocN32Pixels(
+    bitmap_backing_.allocN32Pixels(
         canvas_size_.width(), canvas_size_.height(), layer_is_opaque_);
     // TODO(danak): Remove when skia does the check for us: crbug.com/360384

[danakj, 2014/09/04 14:28:47]

remove this TODO also

-    CHECK(alloc);
     canvas_ = skia::AdoptRef(new SkCanvas(bitmap_backing_));
     DCHECK_EQ(content_rect.width(), canvas_->getBaseLayerSize().width());
     DCHECK_EQ(content_rect.height(), canvas_->getBaseLayerSize().height());
   }
 
   base::TimeTicks start_time =
       rendering_stats_instrumentation_->StartRecording();
   PaintContents(canvas_.get(),
                 content_rect,
                 contents_width_scale,
@@ skipping 31 matching lines @@
 void BitmapContentLayerUpdater::SetOpaque(bool opaque) {
   if (opaque != layer_is_opaque_) {
     canvas_.clear();
     canvas_size_ = gfx::Size();
   }
 
   ContentLayerUpdater::SetOpaque(opaque);
 }
 
 }  // namespace cc