Add PathService::Get(chrome::DIR_USER_PICTURES).

chrome/common/chrome_paths_android.cc

Index: chrome/common/chrome_paths_android.cc
===================================================================
--- chrome/common/chrome_paths_android.cc	(revision 136931)
+++ chrome/common/chrome_paths_android.cc	(working copy)
@@ -33,6 +33,11 @@
   return true;
 }
 
+bool GetUserPicturesDirectory(FilePath* result) {
+  NOTIMPLEMENTED();

[Lei Zhang, 2012/05/14 23:25:51]

We could also just do what GetUserDownloadsDirectory() does. Though I don't
think we'll be using this code on Android any time soon.

+  return false;
+}
+
 bool GetUserDesktop(FilePath* result) {
   NOTIMPLEMENTED() << "Android doesn't support GetUserDesktop";
   return false;