Implement main blink target in GN.

Source/platform/BUILD.gn

Index: Source/platform/BUILD.gn
diff --git a/Source/platform/BUILD.gn b/Source/platform/BUILD.gn
index f207c16689d817b357a2e4b8b926163935c561d6..1f4663cdcf00484574121026ad5c5d257cd618c4 100644
--- a/Source/platform/BUILD.gn
+++ b/Source/platform/BUILD.gn
@@ -7,6 +7,8 @@ import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/platform/platform_generated.gni")
 
+visibility = "//third_party/WebKit/*"
+
 # TODO(GYP) Remove when test targets link (depends on ffmpeg)
 enable_blink_platform_test_targets = false
 
@@ -94,6 +96,7 @@ if (is_mac) {
 # FontFamilyNames action in make_platform_generated in
 # platform_generated.gyp
 action("font_family_names") {
+  visibility = ":*"

[jamesr, 2014/06/19 18:01:14]

in core/BUILD.gn you went the other way - restricted the whole file and exposed
the "core" target. why not do that here?

[brettw, 2014/06/19 18:22:54]

Done.

   script = "../build/scripts/make_names.py"
 
   font_family_names_in = "fonts/FontFamilyNames.in"
@@ -114,6 +117,7 @@ action("font_family_names") {
 # RuntimeEnabledFeatures action in make_platform_generated in
 # platform_generated.gyp
 action("runtime_enabled_features") {
+  visibility = ":*"
   script = "../build/scripts/make_runtime_features.py"
 
   runtime_enabled_features_in = "RuntimeEnabledFeatures.in"
@@ -137,6 +141,7 @@ action("runtime_enabled_features") {
 
 # ColorData action in make_platform_generated in platform_generated.gyp
 action("color_data") {
+  visibility = ":*"
   script = "../build/scripts/gperf.py"
 
   color_data_gperf = "ColorData.gperf"
@@ -342,6 +347,7 @@ component("platform") {
 
 
 yasm_assemble("heap_asm_stubs") {
+  visibility = ":*"
   if (cpu_arch == "x86" || cpu_arch == "x64") {
     sources = [ "heap/asm/SaveRegisters_x86.asm" ]
   } else if (cpu_arch == "arm") {
@@ -372,6 +378,7 @@ yasm_assemble("heap_asm_stubs") {
 }
 
 source_set("heap_run_all_tests") {
+  visibility = ":*"
   sources = [
     "heap/RunAllTests.cpp"
   ]
@@ -393,6 +400,7 @@ source_set("heap_run_all_tests") {
 if (enable_blink_platform_test_targets) {
 
 test("heap_unittests") {
+  visibility = ":*"
   output_name = "blink_heap_unittests"
 
   sources = rebase_path(heap_gypi.platform_heap_test_files, ".", "heap")
@@ -416,6 +424,7 @@ test("heap_unittests") {
 }
 
 source_set("platform_run_all_tests") {
+  visibility = ":*"
   sources = [
     "testing/RunAllTests.cpp"
   ]
@@ -437,6 +446,7 @@ source_set("platform_run_all_tests") {
 if (enable_blink_platform_test_targets) {
 
 test("platform_unittests") {
+  visibility = ":*"
   output_name = "blink_platform_unittests"
 
   sources = platform_gypi.platform_test_files
@@ -473,6 +483,7 @@ test("platform_unittests") {
 
 if (cpu_arch == "arm") {
   source_set("blink_arm_neon") {
+    visibility = ":*"
     sources = blink_platform_neon_files
 
     # The *NEON.cpp files fail to compile when -mthumb is passed. Force