Update external/chromium_org/third_party/skia.

Skia is now pulled in as a single project instead of three subprojects.
Change-Id: I3aeec34fe498effb28086c99facb64e911aee83a

default.xml

@@ -91,9 +91,7 @@
   <project path="external/chromium_org/third_party/opus/src" name="platform/external/chromium_org/third_party/opus/src" />
   <project path="external/chromium_org/third_party/ots" name="platform/external/chromium_org/third_party/ots" />
   <project path="external/chromium_org/third_party/sfntly/cpp/src" name="platform/external/chromium_org/third_party/sfntly/cpp/src" />
-  <project path="external/chromium_org/third_party/skia/gyp" name="platform/external/chromium_org/third_party/skia/gyp" />
-  <project path="external/chromium_org/third_party/skia/include" name="platform/external/chromium_org/third_party/skia/include" />
-  <project path="external/chromium_org/third_party/skia/src" name="platform/external/chromium_org/third_party/skia/src" />
+  <project path="external/chromium_org/third_party/skia" name="platform/external/chromium_org/third_party/skia" />
   <project path="external/chromium_org/third_party/smhasher/src" name="platform/external/chromium_org/third_party/smhasher/src" />
   <project path="external/chromium_org/third_party/usrsctp/usrsctplib" name="platform/external/chromium_org/third_party/usrsctp/usrsctplib" />
   <project path="external/chromium_org/third_party/webrtc" name="platform/external/chromium_org/third_party/webrtc" />