Revert "gpu: Refactor GpuMemoryBuffer framework for multi-process support."

This reverts commit dd37648c2dfb0405e11028c264ef37200ef75001.
Merge tag 'android-4.4.3_r1.1' into HEAD

Android 4.4.3 release 1.1

Conflicts:
	android_webview/java/src/org/chromium/android_webview/AwContents.java
	base/android/jni_generator/jni_generator_tests.py
	content/browser/android/browser_media_player_manager.cc
	content/browser/android/browser_media_player_manager.h
	content/renderer/media/android/webmediaplayer_android.cc
	content/renderer/media/android/webmediaplayer_proxy_android.cc
	content/renderer/media/android/webmediaplayer_proxy_android.h
	media/base/android/media_player_bridge.h
	media/base/android/media_source_player.h

Change-Id: I91ab8fa0e33263ece2033d80aa28ba913890a04e