Merge (-sours) commit 'ccac38a6b48843126402088a309597e682f40fe6' into HEAD

* commit 'ccac38a6b48843126402088a309597e682f40fe6':
  Fix the 'wobbling fixed elements' bug. This CL has a corresponding java counterpart (https://android-git.corp.google.com/g/#change,51150).
Update to use system/core/include 4.2.2_r1.2

Conflicts:
	WebCore/loader/ProgressTracker.cpp
	WebCore/platform/graphics/gtk/MediaPlayerPrivateGStreamer.cpp
	WebKit/mac/WebView/WebDataSource.mm
	WebKit/mac/WebView/WebHTMLView.mm

Conflicts:
	WebKit/android/nav/WebView.cpp
Update to use binary.mk 4.3_r2.1