[DevTools] Prepare to move Popover to shadow DOM.

third_party/WebKit/Source/devtools/BUILD.gn

Index: third_party/WebKit/Source/devtools/BUILD.gn
diff --git a/third_party/WebKit/Source/devtools/BUILD.gn b/third_party/WebKit/Source/devtools/BUILD.gn
index 8f29630d4582afddc5f645375a06d67683346867..c06c640599c21891be3cf43f4bc9bc6668c0c4d0 100644
--- a/third_party/WebKit/Source/devtools/BUILD.gn
+++ b/third_party/WebKit/Source/devtools/BUILD.gn
@@ -122,6 +122,7 @@ all_devtools_files = [
   "front_end/components/DOMBreakpointsSidebarPane.js",
   "front_end/components/DOMPresentationUtils.js",
   "front_end/components/domUtils.css",
+  "front_end/components/imagePreview.css",
   "front_end/components/Linkifier.js",
   "front_end/components/module.json",
   "front_end/components/Reload.js",
@@ -306,6 +307,7 @@ all_devtools_files = [
   "front_end/network/networkPanel.css",
   "front_end/network/NetworkPanel.js",
   "front_end/network/NetworkTimeCalculator.js",
+  "front_end/network/networkTimingTable.css",
   "front_end/network/NetworkWaterfallColumn.js",
   "front_end/network/requestCookiesView.css",
   "front_end/network/RequestCookiesView.js",
@@ -331,6 +333,7 @@ all_devtools_files = [
   "front_end/object_ui/CustomPreviewComponent.js",
   "front_end/object_ui/JavaScriptAutocomplete.js",
   "front_end/object_ui/module.json",
+  "front_end/object_ui/objectPopover.css",
   "front_end/object_ui/ObjectPopoverHelper.js",
   "front_end/object_ui/objectPropertiesSection.css",
   "front_end/object_ui/ObjectPropertiesSection.js",
@@ -490,6 +493,7 @@ all_devtools_files = [
   "front_end/source_frame/FontView.js",
   "front_end/source_frame/imageView.css",
   "front_end/source_frame/ImageView.js",
+  "front_end/source_frame/messagesPopover.css",
   "front_end/source_frame/module.json",
   "front_end/source_frame/ResourceSourceFrame.js",
   "front_end/source_frame/SourceCodeDiff.js",