mac gcapi: Add LaunchGoogleChrome() function.

chrome/installer/gcapi_mac/gcapi.mm

Index: chrome/installer/gcapi_mac/gcapi.mm
diff --git a/chrome/installer/gcapi_mac/gcapi.mm b/chrome/installer/gcapi_mac/gcapi.mm
index 2530e8d2077dead82d06ad6a682e4903c70797e7..12413f51ebe504ada0268be61c39c32682f7fa74 100644
--- a/chrome/installer/gcapi_mac/gcapi.mm
+++ b/chrome/installer/gcapi_mac/gcapi.mm
@@ -122,3 +122,10 @@ int GoogleChromeCompatibilityCheck(unsigned* reasons) {
 
   return local_reasons == 0;
 }
+
+int LaunchGoogleChrome() {
+  @autoreleasepool {

[Mark Mentovai, 2012/05/18 19:15:06]

You used an explicit NSAutoreleasePool in GoogleChromeCompatibilityCheck, but
@autoreleasepool here. Does @autoreleasepool work as far back as 10.5 at
runtime?

[Nico, 2012/05/18 19:21:24]

In GCCC, @autoreleasepool would indent the whole function and it doesn't help
much. Here I'd have to add a `int result = ` variable so that i can drain before
returning, so it's more useful in this function.
As far as I understand, @autoreleasepool is just compiled into normal
NSAutoreleasePool calls when building without -fobjc-arc. I checked that a
simple test program using @autoreleasepool runs fine on 10.5. (arc does need
some support functions, but i believe those are statically linked into the
resulting binary, so even with arc it should run fine on 10.5. I haven't checked
that part though.)

+    return [[NSWorkspace sharedWorkspace]
+        launchApplication:@"/Applications/Google Chrome.app"];
+  }
+}