Move MIME related platform files under network/mime

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 ec4be49fc7f924a9086d439ba199b0e6d534c060..21db15db4ed2d4e340f97732a64eb3b8925d838c 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -249,8 +249,6 @@ component("platform") {
     "ContentDecryptionModuleResult.h",
     "ContentSettingCallbacks.cpp",
     "ContentSettingCallbacks.h",
-    "ContentType.cpp",
-    "ContentType.h",
     "ContextMenu.cpp",
     "ContextMenu.h",
     "ContextMenuItem.cpp",
@@ -303,9 +301,6 @@ component("platform") {
     "LifecycleObserver.h",
     "LinkHash.cpp",
     "LinkHash.h",
-    "MIMETypeFromURL.cpp",
-    "MIMETypeFromURL.h",
-    "MIMETypeRegistry.h",
     "MemoryCoordinator.cpp",
     "MemoryCoordinator.h",
     "PODArena.h",
@@ -1159,7 +1154,12 @@ component("platform") {
     "network/WebSocketHandshakeRequest.h",
     "network/WebSocketHandshakeResponse.cpp",
     "network/WebSocketHandshakeResponse.h",
+    "network/mime/ContentType.cpp",
+    "network/mime/ContentType.h",
+    "network/mime/MIMETypeFromURL.cpp",
+    "network/mime/MIMETypeFromURL.h",
     "network/mime/MIMETypeRegistry.cpp",
+    "network/mime/MIMETypeRegistry.h",
     "peerconnection/RTCAnswerOptionsPlatform.h",
     "peerconnection/RTCOfferOptionsPlatform.h",
     "peerconnection/RTCSessionDescriptionRequest.h",