Added more Layer Properties to show in Styles Panel

Added more helpful layer properties
(ex: opacity, background blur, brightness) to the Styles Panel.

Change-Id: Ib1079d07743db121268cbed34579efa918720fe7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1675339
Commit-Queue: MyungJae Lee <myungjaelee@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672548}

components/ui_devtools/views/element_utility.cc

@@ -3,6 +3,8 @@
 // found in the LICENSE file.
 
 #include "components/ui_devtools/views/element_utility.h"
+
+#include "base/strings/string_number_conversions.h"
 #include "ui/compositor/layer_owner.h"
 
 namespace ui_devtools {
@@ -13,6 +15,25 @@ void AppendLayerProperties(
   ret->emplace_back("layer-type", LayerTypeToString(layer->type()));
   ret->emplace_back("has-layer-mask",
                     layer->layer_mask_layer() ? "true" : "false");
+  ret->emplace_back("layer-opacity", base::NumberToString((layer->opacity())));
+  ret->emplace_back("layer-combined-opacity",
+                    base::NumberToString(layer->GetCombinedOpacity()));
+  ret->emplace_back("background-blur",
+                    base::NumberToString(layer->background_blur()));
+  ret->emplace_back("layer-blur", base::NumberToString(layer->layer_blur()));
+  ret->emplace_back("layer-saturation",
+                    base::NumberToString(layer->layer_saturation()));
+  ret->emplace_back("layer-brightness",
+                    base::NumberToString(layer->layer_brightness()));
+  ret->emplace_back("layer-grayscale",
+                    base::NumberToString(layer->layer_grayscale()));
+  const ui::Layer::ShapeRects* alpha_shape_bounds = layer->alpha_shape();
+  if (alpha_shape_bounds && alpha_shape_bounds->size()) {
+    gfx::Rect bounding_box;
+    for (auto& shape_bound : *alpha_shape_bounds)
+      bounding_box.Union(shape_bound);
+    ret->emplace_back("alpha-shape-bounding-box", bounding_box.ToString());
+  }
   const cc::Layer* cc_layer = layer->cc_layer_for_testing();
   if (cc_layer) {
     // Property trees must be updated in order to get valid render surface