mac: Pin page info contents to top of bubble.

BUG=none
TEST=Click favicon. Page info bubble shouldn't jump around
after 1s but look nice instead (mostly. Now the text at the
bottom jumps now, but that looks way better than everything
but the text jumping.)


Review URL: http://codereview.chromium.org/7575025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95564 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/page_info_bubble_controller.mm

@@ -288,6 +288,7 @@ void ShowPageInfoBubble(gfx::NativeWindow parent,
   scoped_nsobject<PageInfoContentView> contentView(
       [[PageInfoContentView alloc] initWithFrame:contentFrame]);
   [contentView setSubviews:subviews];
+  [contentView setAutoresizingMask:NSViewMinYMargin];
 
   NSRect windowFrame = NSMakeRect(0, 0, kWindowWidth, offset);
   windowFrame.size = [[[self window] contentView] convertSize:windowFrame.size