To change the cursor we need to send a message from
the browser to the viewer with the right HCURSOR. Since the
cursors are a GDI shared resource, we can call ::LoadCursor
in the browser and ::SetCursor in the viewer.
BUG=151718
TEST= moving pointer to a chrome window edge changes cursor to resize cursor
Review URL: https://codereview.chromium.org/11446078
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@172265 0039d316-1c4b-4281-b951-d872f2087c98