Remove GYP annotations from third_party GN files.

third_party/WebKit/public/BUILD.gn

Index: third_party/WebKit/public/BUILD.gn
diff --git a/third_party/WebKit/public/BUILD.gn b/third_party/WebKit/public/BUILD.gn
index dbc4fd3b3afaf03f5f177cc9d9a0485efc72105b..a213831514ec2f64e966ef1c829a0d903512ba11 100644
--- a/third_party/WebKit/public/BUILD.gn
+++ b/third_party/WebKit/public/BUILD.gn
@@ -10,7 +10,6 @@ if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
-# GYP version: WebKit/public/blink.gyp:blink
 group("blink") {
   public_deps = [
     ":blink_headers",
@@ -26,8 +25,6 @@ group("blink") {
 # places that cannot link against the full Blink library.  FIXME: We really
 # shouldn't have this at all and should instead remove all uses of Blink's API
 # types from places that can't link against Blink. crbug.com/248653
-#
-# GYP version: WebKit/public/blink.gyp:blink_minimal
 group("blink_minimal") {
   public_deps = [
     ":blink_headers",
@@ -35,7 +32,6 @@ group("blink_minimal") {
   ]
 }
 
-# GYP version: WebKit/public/blink.gyp:blink_test_support
 group("test_support") {
   testonly = true
   public_deps = [
@@ -44,7 +40,6 @@ group("test_support") {
   ]
 }
 
-# GYP version: WebKit/public/all.gyp:all_blink
 group("all_blink") {
   # This includes some test targets. Don't link into production!
   testonly = true
@@ -77,8 +72,6 @@ config("debug_devtools") {
 }
 
 if (is_android) {
-  # GYP version: WebKit/public/blink_headers.gyp:web_input_event_java
-  # GYP version: WebKit/public/blink_headers.gyp:web_text_input_type
   java_cpp_enum("blink_headers_java_enums_srcjar") {
     sources = [
       "./platform/WebDisplayMode.h",
@@ -87,7 +80,6 @@ if (is_android) {
     ]
   }
 
-  # GYP version: WebKit/public/blink_headers.gyp:blink_headers_java
   android_library("blink_headers_java") {
     deps = [
       "//third_party/android_tools:android_support_annotations_java",
@@ -596,21 +588,18 @@ source_set("blink_headers") {
   ]
 }
 
-# GYP version: WebKit/public/blink_devtools.gyp:blink_devtools_frontend_resources
 group("blink_devtools_frontend_resources") {
   public_deps = [
     "//third_party/WebKit/Source/devtools:devtools_frontend_resources",
   ]
 }
 
-# GYP version: WebKit/public/blink_devtools.gyp:blink_generate_devtools_grd
 group("blink_generate_devtools_grd") {
   public_deps = [
     "//third_party/WebKit/Source/devtools:generate_devtools_grd",
   ]
 }
 
-# GYP version: WebKit/public/blink_resources.gyp:blink_resources
 grit("resources") {
   output_dir = "$root_gen_dir/blink/public/resources"
   use_qualified_include = true
@@ -627,7 +616,6 @@ grit("resources") {
   }
 }
 
-# GYP version: WebKit/public/blink_resources.gyp:blink_image_resources
 grit("image_resources") {
   output_dir = "$root_gen_dir/blink/public/resources"
   use_qualified_include = true
@@ -639,8 +627,6 @@ grit("image_resources") {
   ]
 }
 
-# GYP versions: WebKit/public/blink.gyp:mojo_bindings_mojom,
-# WebKit/public/blink.gyp:mojo_bindings_blink_mojom
 mojom("mojo_bindings") {
   sources = [
     "platform/mime_registry.mojom",
@@ -678,7 +664,6 @@ mojom("mojo_bindings") {
   export_header_blink = "third_party/WebKit/public/platform/WebCommon.h"
 }
 
-# GYP version: WebKit/public/blink.gyp:new_wrapper_types_mojo_bindings
 mojom("new_wrapper_types_mojo_bindings") {
   sources = [
     "platform/modules/permissions/permission.mojom",
@@ -700,7 +685,6 @@ mojom("new_wrapper_types_mojo_bindings") {
   export_header_blink = "third_party/WebKit/public/platform/WebCommon.h"
 }
 
-# GYP version: WebKit/public/blink.gyp:android_mojo_bindings_java
 mojom("android_mojo_bindings") {
   sources = [
     "platform/modules/payments/payment_request.mojom",