[Mac] Make app shims load the same framework version as the running Chrome process.

chrome/common/mac/app_mode_common.h

Index: chrome/common/mac/app_mode_common.h
diff --git a/chrome/common/mac/app_mode_common.h b/chrome/common/mac/app_mode_common.h
index 709e8cd96442b1d04c4f05196094b435046f397c..7759293d25a1c891d772e3901266cec51989c31f 100644
--- a/chrome/common/mac/app_mode_common.h
+++ b/chrome/common/mac/app_mode_common.h
@@ -29,6 +29,10 @@ extern const char kAppShimSocketShortName[];
 // user data dir with this name.
 extern const char kAppShimSocketSymlinkName[];
 
+// A symlink used to store the version string of the currently running Chrome.
+// The shim will read this to determine which version of the framework to load.
+extern const char kAppShimVersionSymlinkName[];
+
 // Special app mode id used for the App Launcher.
 extern const char kAppListModeId[];
 
@@ -105,7 +109,7 @@ extern NSString* const kShortcutBrowserBundleIDPlaceholder;
 
 // Current major/minor version numbers of |ChromeAppModeInfo| (defined below).
 const unsigned kCurrentChromeAppModeInfoMajorVersion = 1;
-const unsigned kCurrentChromeAppModeInfoMinorVersion = 2;
+const unsigned kCurrentChromeAppModeInfoMinorVersion = 3;
 
 // The structure used to pass information from the app mode loader to the
 // (browser) framework. This is versioned using major and minor version numbers,