GTK implementation of remembering platform app window geometry.

chrome/browser/extensions/platform_app_browsertest_util.h

Index: chrome/browser/extensions/platform_app_browsertest_util.h
diff --git a/chrome/browser/extensions/platform_app_browsertest_util.h b/chrome/browser/extensions/platform_app_browsertest_util.h
index 7aa8d3262f60b8ca881e0e4865fa0ee9464c1381..08c515ff65bd7a11a09d8251d94c255e2efadc59 100644
--- a/chrome/browser/extensions/platform_app_browsertest_util.h
+++ b/chrome/browser/extensions/platform_app_browsertest_util.h
@@ -33,6 +33,10 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
   // enough).
   content::WebContents* GetFirstShellWindowWebContents();
 
+  // Gets the first shell window that is found (most tests only deal with one
+  // platform app window, so this is good enough).
+  ShellWindow* GetFirstShellWindow();
+
   // Runs chrome.windows.getAll for the given extension and returns the number
   // of windows that the function returns.
   size_t RunGetWindowsFunctionForExtension(const Extension* extension);