Mac ÜC: Make resize smooth

content/browser/compositor/browser_compositor_view_mac.mm

Index: content/browser/compositor/browser_compositor_view_mac.mm
diff --git a/content/browser/compositor/browser_compositor_view_mac.mm b/content/browser/compositor/browser_compositor_view_mac.mm
index 2151c638e3e70785a538d37b32bf11a9bae4068f..1e28f413ec1b5f77c55ee3107112447b7ad9b799 100644
--- a/content/browser/compositor/browser_compositor_view_mac.mm
+++ b/content/browser/compositor/browser_compositor_view_mac.mm
@@ -76,11 +76,19 @@ BrowserCompositorViewMac::~BrowserCompositorViewMac() {
   }
 }
 
+NSView* BrowserCompositorViewMac::GetView() const {
+  return cocoa_view_;
+}
+
 ui::Compositor* BrowserCompositorViewMac::GetCompositor() const {
-  DCHECK(cocoa_view_);
   return [cocoa_view_ compositor];
 }
 
+bool BrowserCompositorViewMac::HasFrameWithSizeInDIP(
+    const gfx::Size& desired_size_in_dip) const {
+  return [cocoa_view_ hasFrameWithSizeInDIP:desired_size_in_dip];
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserCompositorViewPlaceholderMac