some fixes and warning disables in ui/ for building on win x64

- Some |int|s that should be |ptrdiff_t|s.
- Icon structures are packing to known size (same signs).
- GetWindowLong needs to be GetWindowLongPtr to work on 32 & 64.

[email protected], [email protected]
BUG=167187, 166496

Review URL: https://chromiumcodereview.appspot.com/11889017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176860 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ui/gfx/text_utils.cc b/ui/gfx/text_utils.cc
index a5a1b799..8a2658c 100644
--- a/ui/gfx/text_utils.cc
+++ b/ui/gfx/text_utils.cc
@@ -13,7 +13,7 @@
                                int* accelerated_char_pos,
                                int* accelerated_char_span) {
   bool escaped = false;
-  int last_char_pos = -1;
+  ptrdiff_t last_char_pos = -1;
   int last_char_span = 0;
   base::i18n::UTF16CharIterator chars(&s);
   string16 accelerator_removed;