Mac: Make content shell work with remote CoreAnimation

content/app/content_main_runner.cc

Index: content/app/content_main_runner.cc
diff --git a/content/app/content_main_runner.cc b/content/app/content_main_runner.cc
index 4c8dcbb99c45b9cf19b2637411e2253892f9d1d4..14d8d37f5730e127b561baf0f1335e8deb007df1 100644
--- a/content/app/content_main_runner.cc
+++ b/content/app/content_main_runner.cc
@@ -83,7 +83,11 @@
 #elif defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #if !defined(OS_IOS)
+#include <CoreFoundation/CoreFoundation.h>
+#include "base/mac/mac_util.h"
+#include "base/mac/scoped_cftyperef.h"
 #include "base/power_monitor/power_monitor_device_source.h"
+#include "base/strings/sys_string_conversions.h"
 #include "content/browser/mach_broker_mac.h"
 #include "content/common/sandbox_init_mac.h"
 #endif  // !OS_IOS
@@ -551,6 +555,20 @@ class ContentMainRunnerImpl : public ContentMainRunner {
     // app quits. Each "main" needs to flush this pool right before it goes into
     // its main event loop to get rid of the cruft.
     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
+
+    // CoreAnimation has poor performance and CoreAnimation and
+    // non-CoreAnimation exhibit window flickering when layers are not hosted
+    // in the window server, which is the default when not not using the
+    // 10.9 SDK.
+    // TODO: Remove this when we build with the 10.9 SDK (or higher).
+    if (base::mac::IsOSMavericksOrLater()) {
+      base::ScopedCFTypeRef<CFStringRef> key(base::SysUTF8ToCFStringRef(
+          "NSWindowHostsLayersInWindowServer"));
+      base::ScopedCFTypeRef<CFStringRef> value(base::SysUTF8ToCFStringRef(
+          "YES"));
+      CFPreferencesSetAppValue(
+          key, value, kCFPreferencesCurrentApplication);

[Avi (use Gerrit), 2015/05/07 19:54:44]

CFPreferencesSetAppValue is different than -[NSUserDefaults registerDefaults:].
We don't want to actually save these values, just register them. (This has
bitten us in the past.)

-[NSUserDefaults registerDefaults:] puts the values in the NSRegistrationDomain,
and I can't figure out how to do that with CFPreferences.

+    }
 #endif
 
     // On Android, the command line is initialized when library is loaded and