override applicationShouldTerminate so we can cleanup when we quit

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/636723002

src/views/mac/SampleAppDelegate.h

@@ -21,4 +21,7 @@
 @property (assign) IBOutlet SkOptionsTableView* fOptions;
 
 - (IBAction)toiPadSize:(id)sender;
+
+- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
+
 @end

src/views/mac/SampleAppDelegate.mm

@@ -1,4 +1,7 @@
 #import "SampleAppDelegate.h"
+
+#include "SkApplication.h"
+
 @implementation SampleAppDelegate
 @synthesize fWindow, fView, fOptions;
 
@@ -13,4 +16,10 @@
     NSRect frame = NSMakeRect(fWindow.frame.origin.x, fWindow.frame.origin.y, 768, 1024);
     [fWindow setFrame:frame display:YES animate:YES];
 }
+
+- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender {
+    application_term();
+    return NSTerminateNow;
+}
+
 @end

src/views/mac/skia_mac.mm

@@ -14,7 +14,11 @@ int main(int argc, char *argv[]) {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
     application_init();
     int retVal =  NSApplicationMain(argc, (const char **)argv);
+    
+#if 0
+    // we don't expect NSApplicationMain to return. See our applicationShouldTerminate handler.
     application_term();
     [pool release];
+#endif
     return retVal;
 }