[Mac] Use the app's version as the app shim bundle version.

chrome/common/mac/app_mode_chrome_locator.mm

Index: chrome/common/mac/app_mode_chrome_locator.mm
diff --git a/chrome/common/mac/app_mode_chrome_locator.mm b/chrome/common/mac/app_mode_chrome_locator.mm
index 923e671d804e356e6e42cfd1a17cd96ff6e8081d..9e2860ee181c8ebc3a755a076a8fc5dc26c370c7 100644
--- a/chrome/common/mac/app_mode_chrome_locator.mm
+++ b/chrome/common/mac/app_mode_chrome_locator.mm
@@ -54,7 +54,12 @@ bool GetChromeBundleInfo(const base::FilePath& chrome_bundle,
       !base::PathExists(base::mac::NSStringToFilePath(cr_versioned_path))) {
     // Read version string.
     NSString* cr_version = ObjCCast<NSString>(
-        [cr_bundle objectForInfoDictionaryKey:@"CFBundleShortVersionString"]);
+        [cr_bundle objectForInfoDictionaryKey:@"CrBundleVersion"]);

[tapted, 2015/03/18 01:49:59]

kCrBundleVersionKey?

Although I guess that's not linked here. If that's not easy to do, can we
instead pull it out to declared constant at the top of the file, with a comment
saying it comes from app_mode_common.mm and why it's not just #included.

[jackhou1, 2015/03/18 04:43:48]

Done.

+    if (!cr_version) {
+      // Older bundles have the Chrome version in the following key.
+      cr_version = ObjCCast<NSString>(
+          [cr_bundle objectForInfoDictionaryKey:@"CFBundleShortVersionString"]);
+    }
     if (!cr_version)
       return false;