Remove some jumbo exclusions no longer needed

The files listed in core_generated jumbo exclusions have since been
fixed so the exclusions are no longer necessary.

R=fs@opera.com

Bug: 713137
Change-Id: Ib9a9216147e9df7d8b196de761556d3f23997448
Reviewed-on: https://chromium-review.googlesource.com/571222
Commit-Queue: Daniel Bratell <bratell@opera.com>
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#486804}

third_party/WebKit/Source/core/BUILD.gn

@@ -1102,19 +1102,6 @@ jumbo_target("core_generated") {
   foreach(current, targets_generating_sources) {
     sources += get_target_outputs(current)
   }
-  jumbo_excluded_sources = [
-    # Same variables as HTMLElementFactory
-    "$blink_core_output_dir/SVGElementFactory.cpp",
-
-    # Same variables (stringpool_t, stringpool_contents) as CSSValueKeywords
-    "$blink_core_output_dir/CSSPropertyNames.cpp",
-
-    # Global "using namespace blink" and "using namespace XPath"
-    "$blink_core_output_dir/XPathGrammar.cpp",
-
-    # Using global "using namespace WTF"
-    "//third_party/WebKit/Source/bindings/core/v8/custom/V8CSSStyleDeclarationCustom.cpp",
-  ]
   public_deps = [
     ":all_generators",
     "//third_party/WebKit/Source/bindings/core/v8:bindings_core_impl",