Merge FrameView and ScrollView.

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 739 matching lines @@
       'scheduler/Scheduler.h',
       'scheduler/TracedTask.cpp',
       'scheduler/TracedTask.h',
       'scroll/ProgrammaticScrollAnimator.cpp',
       'scroll/ProgrammaticScrollAnimator.h',
       'scroll/ScrollAnimator.cpp',
       'scroll/ScrollAnimator.h',
       'scroll/ScrollAnimatorNone.cpp',
       'scroll/ScrollAnimatorNone.h',
       'scroll/ScrollTypes.h',
-      'scroll/ScrollView.cpp',
       'scroll/ScrollableArea.cpp',
       'scroll/ScrollableArea.h',
       'scroll/Scrollbar.cpp',
       'scroll/Scrollbar.h',
       'scroll/ScrollbarTheme.cpp',
       'scroll/ScrollbarTheme.h',
       'scroll/ScrollbarThemeAndroid.cpp',
       'scroll/ScrollbarThemeAura.cpp',
       'scroll/ScrollbarThemeAura.h',
       'scroll/ScrollbarThemeClient.h',
@@ skipping 186 matching lines @@
       'graphics/ImageFrameGeneratorTest.cpp',
       'graphics/ImageLayerChromiumTest.cpp',
       'graphics/test/MockImageDecoder.h',
       'graphics/test/MockWebGraphicsContext3D.h',
       'image-decoders/gif/GIFImageDecoderTest.cpp',
       'image-decoders/jpeg/JPEGImageDecoderTest.cpp',
       'image-decoders/webp/WEBPImageDecoderTest.cpp',
     ],
   },
 }