Remove bogus use of the term "user style" in Blink and Blink API

Source/core/core.gypi

 {
     'variables': {
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 1264 matching lines @@
             'page/SpeechInputResult.h',
             'page/SpeechInputResultList.cpp',
             'page/SpeechInputResultList.h',
             'page/SuspendableTimer.cpp',
             'page/SuspendableTimer.h',
             'page/TouchAdjustment.cpp',
             'page/TouchAdjustment.h',
             'page/TouchDisambiguation.cpp',
             'page/TouchDisambiguation.h',
             'page/UseCounter.cpp',
-            'page/UserContentURLPattern.cpp',
             'page/WindowFeatures.cpp',
             'page/WindowFocusAllowedIndicator.cpp',
             'page/WorkerNavigator.cpp',
             'page/WorkerNavigator.h',
             'page/animation/AnimationBase.cpp',
             'page/animation/AnimationBase.h',
             'page/animation/AnimationController.cpp',
             'page/animation/AnimationControllerPrivate.h',
             'page/animation/CompositeAnimation.cpp',
             'page/animation/CompositeAnimation.h',
@@ skipping 2548 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }