mac: Use a full-size content view (reland 1).

chrome/browser/ui/cocoa/tabs/tab_window_controller.h

Index: chrome/browser/ui/cocoa/tabs/tab_window_controller.h
diff --git a/chrome/browser/ui/cocoa/tabs/tab_window_controller.h b/chrome/browser/ui/cocoa/tabs/tab_window_controller.h
index 7238b090d55db0b4715989bbd9288d1fcfe31f7d..1c4e9e1b92a03116c967c8f7af536aaf75fd37bd 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_window_controller.h
+++ b/chrome/browser/ui/cocoa/tabs/tab_window_controller.h
@@ -23,10 +23,20 @@
 
 @interface TabWindowController : NSWindowController<NSWindowDelegate> {
  @private
+  // Wrapper view around web content, and the developer tools view.
   base::scoped_nsobject<FastResizeView> tabContentArea_;
   base::scoped_nsobject<NSView> tabStripBackgroundView_;
+
+  // The tab strip overlaps the titlebar of the window.
   base::scoped_nsobject<TabStripView> tabStripView_;
 
+  // No views should be added directly to the root view. Views that overlap
+  // the title bar should be added to the window's contentView. All other views
+  // should be added to chromeContentView_. This allows tab dragging and
+  // fullscreen logic to easily move the views that don't need special
+  // treatment.
+  base::scoped_nsobject<NSView> chromeContentView_;
+
   // The child window used during dragging to achieve the opacity tricks.
   NSWindow* overlayWindow_;
 
@@ -40,6 +50,7 @@
 @property(readonly, nonatomic) NSView* tabStripBackgroundView;
 @property(readonly, nonatomic) TabStripView* tabStripView;
 @property(readonly, nonatomic) FastResizeView* tabContentArea;
+@property(readonly, nonatomic) NSView* chromeContentView;
 
 // This is the designated initializer for this class.
 - (id)initTabWindowControllerWithTabStrip:(BOOL)hasTabStrip;
@@ -157,6 +168,12 @@
 // The tab strip should always be inserted directly above the content view.
 - (void)insertTabStripView:(NSView*)tabStripView intoWindow:(NSWindow*)window;
 
+// The tab strip background view should always be inserted as the back-most
+// subview of the root view. It cannot be a subview of the contentView, as that
+// would cause it to become layer backed, which would cause it to draw on top
+// of non-layer backed content like the window controls.
+- (void)insertTabStripBackgroundViewIntoWindow:(NSWindow*)window;
+
 @end
 
 @interface TabWindowController(ProtectedMethods)