[Mac] Give info bubble windows a gaussian blur and a smaller border radius.

chrome/browser/ui/cocoa/info_bubble_window.mm

Index: chrome/browser/ui/cocoa/info_bubble_window.mm
diff --git a/chrome/browser/ui/cocoa/info_bubble_window.mm b/chrome/browser/ui/cocoa/info_bubble_window.mm
index aa4b5c982f949bfcc43a6268f624eb2211a51347..eda0f2c130f2cd86ee929882095c88fabcd7591b 100644
--- a/chrome/browser/ui/cocoa/info_bubble_window.mm
+++ b/chrome/browser/ui/cocoa/info_bubble_window.mm
@@ -6,6 +6,7 @@
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/mac/foundation_util.h"
 #include "base/memory/scoped_nsobject.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -22,9 +23,28 @@ const NSTimeInterval kOrderOutAnimationDuration = 0.15;
 // animation as quickly as possible.
 const NSTimeInterval kMinimumTimeInterval =
     std::numeric_limits<NSTimeInterval>::min();
-}
-
-@interface InfoBubbleWindow(Private)
+}  // namespace
+
+// Forward declare private window server functions used to style the window.
+extern "C" {
+typedef int CGSConnection;
+typedef int CGSWindow;
+typedef void* CGSWindowFilterRef;
+
+CGSConnection _CGSDefaultConnection();
+CGError CGSNewCIFilterByName(CGSConnection cid,
+                             CFStringRef filterName,
+                             CGSWindowFilterRef *outFilter);
+CGError CGSAddWindowFilter(CGSConnection cid,
+                           CGSWindow wid,
+                           CGSWindowFilterRef filter,
+                           int flags);
+CGError CGSReleaseCIFilter(CGSConnection cid, CGSWindowFilterRef filter);
+CGError CGSSetCIFilterValuesFromDictionary(
+    CGSConnection cid, CGSWindowFilterRef filter, CFDictionaryRef filterValues);
+}  // extern "C"
+
+@interface InfoBubbleWindow (Private)
 - (void)appIsTerminating;
 - (void)finishCloseAfterAnimation;
 @end
@@ -202,6 +222,23 @@ class AppNotificationBridge : public content::NotificationObserver {
     newOrigin.y += kOrderInSlideOffset;
     [self setFrameOrigin:newOrigin];
 
+    // Add a gaussian blur to the window.
+    CGSConnection cgsConnection = _CGSDefaultConnection();
+    CGSWindowFilterRef filter;
+    if (CGSNewCIFilterByName(cgsConnection, CFSTR("CIGaussianBlur"),
+                             &filter) == kCGErrorSuccess) {
+      NSDictionary* blurOptions =
+          [NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:1.5]
+                                      forKey:@"inputRadius"];
+
+      if (CGSSetCIFilterValuesFromDictionary(cgsConnection, filter,
+              base::mac::NSToCFCast(blurOptions)) == kCGErrorSuccess) {
+        CGSAddWindowFilter(cgsConnection, [self windowNumber], filter, 1);
+      }
+
+      CGSReleaseCIFilter(cgsConnection, filter);
+    }
+
     // Apply animations to show and move self.
     [NSAnimationContext beginGrouping];
     // The star currently triggers on mouse down, not mouse up.