Revert CompressibleString (and its UMA)

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 974 matching lines @@
       'text/BidiCharacterRun.h',
       'text/BidiContext.cpp',
       'text/BidiContext.h',
       'text/BidiResolver.h',
       'text/BidiRunList.h',
       'text/BidiTextRun.cpp',
       'text/BidiTextRun.h',
       'text/Character.cpp',
       'text/Character.h',
       'text/CharacterEmoji.cpp',
-      'text/CompressibleString.cpp',
-      'text/CompressibleString.h',
       'text/DateTimeFormat.cpp',
       'text/DateTimeFormat.h',
       'text/DecodeEscapeSequences.h',
       'text/Hyphenation.cpp',
       'text/Hyphenation.h',
       'text/LineEnding.cpp',
       'text/LineEnding.h',
       'text/LocaleICU.cpp',
       'text/LocaleICU.h',
       'text/LocaleMac.h',
@@ skipping 349 matching lines @@
       ['use_default_render_theme==1',
         {
           'platform_test_files': [
             'scroll/ScrollbarThemeAuraTest.cpp',
           ],
         }
       ],
     ],
   },
 }