Rename FormData/FormDataBuilder to EncodedFormData/FormDataEncoder respectively.

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 750 matching lines @@
       'mhtml/ArchiveResourceCollection.cpp',
       'mhtml/ArchiveResourceCollection.h',
       'mhtml/MHTMLArchive.cpp',
       'mhtml/MHTMLArchive.h',
       'mhtml/MHTMLParser.cpp',
       'mhtml/MHTMLParser.h',
       'network/ContentSecurityPolicyParsers.cpp',
       'network/ContentSecurityPolicyParsers.h',
       'network/ContentSecurityPolicyResponseHeaders.cpp',
       'network/ContentSecurityPolicyResponseHeaders.h',
-      'network/FormData.cpp',
-      'network/FormData.h',
-      'network/FormDataBuilder.cpp',
-      'network/FormDataBuilder.h',
+      'network/EncodedFormData.cpp',
+      'network/EncodedFormData.h',
+      'network/FormDataEncoder.cpp',
+      'network/FormDataEncoder.h',
       'network/HTTPHeaderMap.cpp',
       'network/HTTPHeaderMap.h',
       'network/HTTPParsers.cpp',
       'network/HTTPParsers.h',
       'network/HTTPRequest.cpp',
       'network/HTTPRequest.h',
       'network/NetworkHints.cpp',
       'network/NetworkHints.h',
       'network/ParsedContentType.cpp',
       'network/ParsedContentType.h',
@@ skipping 200 matching lines @@
       'graphics/ThreadSafeDataTransportTest.cpp',
       'graphics/filters/FilterOperationsTest.cpp',
       'graphics/filters/ImageFilterBuilderTest.cpp',
       'graphics/gpu/DrawingBufferTest.cpp',
       'graphics/paint/DisplayItemPropertyTreeBuilderTest.cpp',
       'graphics/paint/DisplayItemListTest.cpp',
       'graphics/paint/DisplayItemTest.cpp',
       'image-decoders/FastSharedBufferReaderTest.cpp',
       'image-decoders/ImageDecoderTest.cpp',
       'mac/VersionUtilMacTest.mm',
-      'network/FormDataTest.cpp',
+      'network/EncodedFormDataTest.cpp',
       'network/HTTPParsersTest.cpp',
       'network/ResourceRequestTest.cpp',
       'scheduler/CancellableTaskFactoryTest.cpp',
       'scroll/ScrollableAreaTest.cpp',
       'testing/ArenaTestHelpers.h',
       'testing/TreeTestHelpers.cpp',
       'testing/TreeTestHelpers.h',
       'text/BidiResolverTest.cpp',
       'text/DateTimeFormatTest.cpp',
       'text/SegmentedStringTest.cpp',
@@ skipping 59 matching lines @@
       ['os_posix==1 and OS!="mac"',
         {
           'platform_test_files': [
             'text/LocaleICUTest.cpp',
           ],
         }
       ],
     ],
   },
 }