Mac: Fix Xcode 7 (10.11 SDK) build errors (issue #1732)

libcef/browser/native/javascript_dialog_runner_mac.mm

@@ -140,8 +140,13 @@ void CefJavaScriptDialogRunnerMac::Run(
     [other setKeyEquivalent:@"\e"];
   }
 
+  // Calling beginSheetModalForWindow:nil is wrong API usage. For now work
+  // around the "callee requires a non-null argument" error that occurs when
+  // building with the 10.11 SDK. See http://crbug.com/383820 for related
+  // discussion.
+  id nilArg = nil;
   [alert
-      beginSheetModalForWindow:nil  // nil here makes it app-modal
+      beginSheetModalForWindow:nilArg  // nil here makes it app-modal
                  modalDelegate:helper_
                 didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)
                    contextInfo:this];
@@ -163,4 +168,3 @@ void CefJavaScriptDialogRunnerMac::DialogClosed(
   helper_.reset(nil);
   callback_.Run(success, user_input);
 }
-

tests/cefclient/browser/browser_window_osr_mac.mm

@@ -772,7 +772,11 @@ BrowserOpenGLView* GLView(NSView* view) {
                                         clickCount:1
                                           pressure:1.0];
 
-  [window dragImage:nil
+  // TODO(cef): Pass a non-nil value to dragImage (see issue #1715). For now
+  // work around the "callee requires a non-null argument" error that occurs
+  // when building with the 10.11 SDK.
+  id nilArg = nil;
+  [window dragImage:nilArg
                  at:position
              offset:NSZeroSize
               event:dragEvent

tests/cefclient/renderer/performance_test.cc

@@ -35,7 +35,7 @@ class V8Handler : public CefV8Handler {
                        CefRefPtr<CefV8Value> object,
                        const CefV8ValueList& arguments,
                        CefRefPtr<CefV8Value>& retval,
-                       CefString& exception) {
+                       CefString& exception) OVERRIDE {
     if (name == kRunPerfTest) {
       if (arguments.size() == 1 && arguments[0]->IsString()) {
         // Run the specified perf test.