Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 486 matching lines @@
       'fonts/win/FontCacheSkiaWin.cpp',
       'fonts/win/FontFallbackWin.cpp',
       'fonts/win/FontFallbackWin.h',
       'fonts/win/FontPlatformDataWin.cpp',
       'geometry/DoublePoint.cpp',
       'geometry/DoublePoint.h',
       'geometry/DoubleRect.cpp',
       'geometry/DoubleRect.h',
       'geometry/DoubleSize.cpp',
       'geometry/DoubleSize.h',
+      'geometry/FloatBox.cpp',
+      'geometry/FloatBox.h',
       'geometry/FloatRectOutsets.h',
       'geometry/FloatPoint.cpp',
       'geometry/FloatPoint.h',
       'geometry/FloatPoint3D.cpp',
       'geometry/FloatPoint3D.h',
       'geometry/FloatPolygon.cpp',
       'geometry/FloatPolygon.h',
       'geometry/FloatQuad.cpp',
       'geometry/FloatQuad.h',
       'geometry/FloatRect.cpp',
@@ skipping 929 matching lines @@
       ['use_default_render_theme==1',
         {
           'platform_test_files': [
             'scroll/ScrollbarThemeAuraTest.cpp',
           ],
         }
       ],
     ],
   },
 }