Inline core HTML and SVG sources in the GN build.

third_party/WebKit/Source/core/style/BUILD.gn

Index: third_party/WebKit/Source/core/style/BUILD.gn
diff --git a/third_party/WebKit/Source/core/observer/BUILD.gn b/third_party/WebKit/Source/core/style/BUILD.gn
similarity index 64%
copy from third_party/WebKit/Source/core/observer/BUILD.gn
copy to third_party/WebKit/Source/core/style/BUILD.gn
index 5d6acd81bcb8768641d112f4ef3372444d8770ed..7ab04775d02d5883eabbf22987bc6f94fb8672a9 100644
--- a/third_party/WebKit/Source/core/observer/BUILD.gn
+++ b/third_party/WebKit/Source/core/style/BUILD.gn
@@ -4,19 +4,12 @@
 
 import("//third_party/WebKit/Source/core/core.gni")
 
-target(core_link_small_target_type, "observer") {
+target(core_link_small_target_type, "svg") {
   visibility = [ "//third_party/WebKit/Source/core/*" ]
 
   sources = [
-    "ResizeObservation.cpp",
-    "ResizeObservation.h",
-    "ResizeObserver.cpp",
-    "ResizeObserver.h",
-    "ResizeObserverCallback.h",
-    "ResizeObserverController.cpp",
-    "ResizeObserverController.h",
-    "ResizeObserverEntry.cpp",
-    "ResizeObserverEntry.h",
+    "SVGComputedStyle.cpp",
+    "SVGComputedStyleDefs.cpp",
   ]
 
   configs -= core_config_remove