[WIP] cc: Use sRGB for rastering non-wide-color-gamut content

cc/paint/display_item_list.cc

 // Copyright 2014 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/paint/display_item_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 318 matching lines @@
   // contribute to memory usage?
   // TODO(vmpstr): Probably DiscardableImageMap is worth counting here.
 
   return memory_usage;
 }
 
 bool DisplayItemList::ShouldBeAnalyzedForSolidColor() const {
   return ApproximateOpCount() <= kOpCountThatIsOkToAnalyze;
 }
 
+bool DisplayItemList::HasNonSRGBContent() const {
+  return image_map_.has_non_srgb_images();

[vmpstr, 2017/05/09 22:58:27]

One thing to note (and I think we're pretty far down this patch), but the whole
discardable image caching in the compositor only cares about lazy images. Things
like bitmaps and I think ico files just get passed through. I'm assuming those
don't specify an image space or we don't care?

+}
+
 void DisplayItemList::EmitTraceSnapshot() const {
   bool include_items;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.display_items"), &include_items);
   TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.display_items") ","
       TRACE_DISABLED_BY_DEFAULT("cc.debug.picture") ","
       TRACE_DISABLED_BY_DEFAULT("devtools.timeline.picture"),
       "cc::DisplayItemList", this, CreateTracedValue(include_items));
 }
@@ skipping 209 matching lines @@
     std::vector<DrawImage>* images) {
   image_map_.GetDiscardableImagesInRect(rect, contents_scale,
                                         target_color_space, images);
 }
 
 gfx::Rect DisplayItemList::GetRectForImage(ImageId image_id) const {
   return image_map_.GetRectForImage(image_id);
 }
 
 }  // namespace cc