Mojo C++ bindings: make String16 and gfx::Size available in Blink

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 0c79c122893cd97c5eccc8fa434962494228e8c0..b6deaf54b67cb3c565d6f66c0e62ffeee0079f8f 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1066,6 +1066,7 @@ component("platform") {
     "mhtml/MHTMLArchive.h",
     "mhtml/MHTMLParser.cpp",
     "mhtml/MHTMLParser.h",
+    "mojo/CommonCustomTypesStructTraits.cpp",
     "mojo/MojoHelper.h",
     "network/ContentSecurityPolicyParsers.cpp",
     "network/ContentSecurityPolicyParsers.h",
@@ -1682,7 +1683,9 @@ test("blink_platform_unittests") {
     "image-decoders/webp/WEBPImageDecoderTest.cpp",
     "json/JSONParserTest.cpp",
     "mac/VersionUtilMacTest.mm",
+    "mojo/CommonCustomTypesStructTraitsTest.cpp",
     "mojo/KURLSecurityOriginTest.cpp",
+    "mojo/WebGeometryStructTraitsTest.cpp",
     "network/EncodedFormDataTest.cpp",
     "network/HTTPParsersTest.cpp",
     "network/LinkHeaderTest.cpp",
@@ -1772,6 +1775,7 @@ test("blink_platform_unittests") {
     "//cc",
     "//cc:test_support",
     "//cc/blink",
+    "//mojo/common:test_common_custom_types_blink",
     "//mojo/edk/embedder:headers",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/bindings/tests:for_blink_tests",
@@ -1782,6 +1786,7 @@ test("blink_platform_unittests") {
     "//third_party/harfbuzz-ng",
     "//ui/gfx",
     "//ui/gfx/geometry",
+    "//ui/gfx/geometry/mojo:test_interfaces_blink",
     "//url",
     "//url/mojo:test_url_mojom_gurl_blink",
   ]