DevTools: devtools flickers when toggling between tab w/ tools and tab w/o tools.

Follow up to https://codereview.chromium.org/12254021.
Currently, Mac has an NSView wrapper around the internal contents' native view. Internal NSView respects the bookmarks bubble and is currently updated upon setTopContentOffset. I swapped frame updates for internal and external NSViews to reduce the flickering as a short term solution. We really need to change it in a way that only one update is taking place.

Review URL: https://chromiumcodereview.appspot.com/14935015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202458 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/dev_tools_controller.mm

@@ -163,11 +163,11 @@ using content::WebContents;
       [[NSView alloc] initWithFrame:containerRect]);
   [devToolsContainerView addSubview:devToolsView];
   [splitView_ addSubview:devToolsContainerView];
-  [self updateDevToolsViewFrame];
 
   BOOL isVertical = devToolsWindow_->dock_side() == DEVTOOLS_DOCK_SIDE_RIGHT;
   [splitView_ setVertical:isVertical];
   [self updateDevToolsSplitPosition];
+  [self updateDevToolsViewFrame];
 }
 
 - (void)hideDevToolsContainer {