Allow platform apps to specify a maximum size for the shell container.

chrome/common/extensions/extension_constants.cc

Index: chrome/common/extensions/extension_constants.cc
diff --git a/chrome/common/extensions/extension_constants.cc b/chrome/common/extensions/extension_constants.cc
index 38ece131873bf84d4fbbbac3d5432e96ef8eb1eb..c50c2e5b7948f80631a164a45930da1c8f0580e4 100644
--- a/chrome/common/extensions/extension_constants.cc
+++ b/chrome/common/extensions/extension_constants.cc
@@ -58,6 +58,8 @@ const char kLaunchContainer[] = "app.launch.container";
 const char kLaunchHeight[] = "app.launch.height";
 const char kLaunchLocalPath[] = "app.launch.local_path";
 const char kLaunchWebURL[] = "app.launch.web_url";
+const char kLaunchMaxHeight[] = "app.launch.max_height";
+const char kLaunchMaxWidth[] = "app.launch.max_width";
 const char kLaunchMinHeight[] = "app.launch.min_height";
 const char kLaunchMinWidth[] = "app.launch.min_width";
 const char kLaunchWidth[] = "app.launch.width";