Add most missing blink files to .gn files

third_party/WebKit/Source/platform/BUILD.gn

Index: third_party/WebKit/Source/platform/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
index 051deadc10bcb6ad8f79b035d4a9144c52711c52..86c87bc2d18403b59e709ee19d79ace254a0494e 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -222,6 +222,7 @@ component("platform") {
 
   sources = [
     "AsyncFileSystemCallbacks.h",
+    "AsyncMethodRunner.h",
     "CalculationValue.h",
     "ContentDecryptionModuleResult.h",
     "ContentSettingCallbacks.cpp",
@@ -230,8 +231,10 @@ component("platform") {
     "ContextMenu.h",
     "ContextMenuItem.cpp",
     "ContextMenuItem.h",
+    "CrossOriginAttributeValue.h",
     "CrossThreadCopier.cpp",
     "CrossThreadCopier.h",
+    "CrossThreadFunctional.h",
     "Crypto.cpp",
     "Crypto.h",
     "CryptoResult.h",
@@ -290,6 +293,7 @@ component("platform") {
     "PartitionAllocMemoryDumpProvider.cpp",
     "PartitionAllocMemoryDumpProvider.h",
     "PasteMode.h",
+    "PlatformExport.h",
     "PlatformResourceLoader.cpp",
     "PlatformResourceLoader.h",
     "PluginScriptForbiddenScope.cpp",
@@ -585,6 +589,7 @@ component("platform") {
     "fonts/AlternateFontFamily.h",
     "fonts/CharacterRange.h",
     "fonts/CustomFontData.h",
+    "fonts/FallbackListCompositeKey.h",
     "fonts/Font.cpp",
     "fonts/Font.h",
     "fonts/FontBaseline.h",
@@ -612,9 +617,14 @@ component("platform") {
     "fonts/FontFallbackPriority.h",
     "fonts/FontFamily.cpp",
     "fonts/FontFamily.h",
+    "fonts/FontMetrics.h",
+    "fonts/FontOrientation.h",
     "fonts/FontPlatformData.cpp",
     "fonts/FontPlatformData.h",
+    "fonts/FontSmoothingMode.h",
+    "fonts/FontTraits.h",
     "fonts/FontVariantNumeric.h",
+    "fonts/FontWidthVariant.h",
     "fonts/GenericFontFamilySettings.cpp",
     "fonts/GenericFontFamilySettings.h",
     "fonts/GlyphMetricsMap.h",
@@ -630,6 +640,8 @@ component("platform") {
     "fonts/SmallCapsIterator.h",
     "fonts/SymbolsIterator.cpp",
     "fonts/SymbolsIterator.h",
+    "fonts/TextRenderingMode.h",
+    "fonts/TypesettingFeatures.h",
     "fonts/UTF16TextIterator.cpp",
     "fonts/UTF16TextIterator.h",
     "fonts/UnicodeRangeSet.cpp",
@@ -770,10 +782,12 @@ component("platform") {
     "graphics/CompositorElementId.h",
     "graphics/CompositorFilterOperations.cpp",
     "graphics/CompositorFilterOperations.h",
+    "graphics/CompositorMutableProperties.h",
     "graphics/CompositorMutableState.cpp",
     "graphics/CompositorMutableState.h",
     "graphics/CompositorMutableStateProvider.cpp",
     "graphics/CompositorMutableStateProvider.h",
+    "graphics/CompositorMutation.h",
     "graphics/CompositorMutationsTarget.h",
     "graphics/CompositorMutator.h",
     "graphics/CompositorMutatorClient.cpp",
@@ -784,6 +798,7 @@ component("platform") {
     "graphics/ContiguousContainer.h",
     "graphics/CrossfadeGeneratedImage.cpp",
     "graphics/CrossfadeGeneratedImage.h",
+    "graphics/DashArray.h",
     "graphics/DecodingImageGenerator.cpp",
     "graphics/DecodingImageGenerator.h",
     "graphics/DeferredImageDecoder.cpp",
@@ -1586,8 +1601,10 @@ static_library("test_support") {
   testonly = true
 
   sources = [
+    "graphics/gpu/DrawingBufferTestHelpers.h",
     "network/mime/MockMimeRegistry.h",
     "scheduler/base/task_queue_manager_delegate_for_test.cc",
+    "scheduler/base/test_task_time_observer.h",
     "scheduler/base/test_time_source.cc",
     "scheduler/base/test_time_source.h",
     "scheduler/child/scheduler_tqm_delegate_for_test.cc",