Fix Windows build warning LNK4217 for blink_platform.dll.

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 d4cab47adf1e55e83112cd146b99f3c78d3f37cf..a38d3df3f011b2a3b8e13e4c9edabc0693add45e 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1129,7 +1129,6 @@ component("platform") {
     "mhtml/MHTMLParser.cpp",
     "mhtml/MHTMLParser.h",
     "mojo/CommonCustomTypesStructTraits.cpp",
-    "mojo/GeometryStructTraits.cpp",
     "mojo/MojoHelper.h",
     "network/ContentSecurityPolicyParsers.cpp",
     "network/ContentSecurityPolicyParsers.h",
@@ -1518,14 +1517,6 @@ component("platform") {
       "/wd4334",  # Result of 32-bit shift implicitly converted to 64 bits.
       "/wd4724",  # Modulo by 0.
     ]
-
-    # crbug.com/654776: Suppress symbol import warnings.
-    if (is_component_build) {
-      ldflags = [
-        "/ignore:4217",
-        "/ignore:4049",
-      ]
-    }
   } else {
     sources -= [
       "clipboard/ClipboardUtilitiesWin.cpp",