Remove many unused files from //skia/ext

ui/gfx/android/gfx_jni_registrar.cc

Index: ui/gfx/android/gfx_jni_registrar.cc
diff --git a/ui/gfx/android/gfx_jni_registrar.cc b/ui/gfx/android/gfx_jni_registrar.cc
index 5b9ab1dbf1558d7e3bc1a89c7b2242bbcd42b529..6389beca9b32b7c766a71617f412dfe1846c58d5 100644
--- a/ui/gfx/android/gfx_jni_registrar.cc
+++ b/ui/gfx/android/gfx_jni_registrar.cc
@@ -6,7 +6,6 @@
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
-#include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/android/shared_device_display_info.h"
 #include "ui/gfx/android/view_configuration.h"
 
@@ -16,7 +15,6 @@ namespace android {
 static base::android::RegistrationMethod kGfxRegisteredMethods[] = {
   { "SharedDeviceDisplayInfo",
       SharedDeviceDisplayInfo::RegisterSharedDeviceDisplayInfo },
-  { "JavaBitmap", JavaBitmap::RegisterJavaBitmap },
   { "ViewConfiguration", ViewConfiguration::RegisterViewConfiguration }
 };