Give the browser window's content view a CALayers

chrome/browser/ui/cocoa/fast_resize_view.mm

Index: chrome/browser/ui/cocoa/fast_resize_view.mm
diff --git a/chrome/browser/ui/cocoa/fast_resize_view.mm b/chrome/browser/ui/cocoa/fast_resize_view.mm
index 87f7787f287ecc9477ac018a8c3ad258f3f5aace..6d6b8c17b0e8932367a05aabca7957d14d5b60b1 100644
--- a/chrome/browser/ui/cocoa/fast_resize_view.mm
+++ b/chrome/browser/ui/cocoa/fast_resize_view.mm
@@ -4,6 +4,7 @@
 
 #import <Cocoa/Cocoa.h>
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
+#import "chrome/browser/ui/cocoa/nsview_additions.h"
 
 #include "base/logging.h"
 
@@ -16,6 +17,17 @@
 
 @implementation FastResizeView
 
+- (id)initWithFrame:(NSRect)frameRect {
+  if ((self = [super initWithFrame:frameRect])) {
+    [self cr_setHostsSolidWhiteLayer];
+  }
+  return self;
+}
+
+- (BOOL)isOpaque {
+  return YES;
+}
+
 - (void)setFastResizeMode:(BOOL)fastResizeMode {
   if (fastResizeMode_ == fastResizeMode)
     return;