ui: Remove gfx::Size::ClampToNonNegative, prevent negative sizes always.

chrome/browser/ui/extensions/shell_window.h

Index: chrome/browser/ui/extensions/shell_window.h
diff --git a/chrome/browser/ui/extensions/shell_window.h b/chrome/browser/ui/extensions/shell_window.h
index 692c8248f4c658d41f72329f7247e78d2ff7cb9f..8c03b014be21b5189b3027a02408d8364950fb8a 100644
--- a/chrome/browser/ui/extensions/shell_window.h
+++ b/chrome/browser/ui/extensions/shell_window.h
@@ -62,8 +62,9 @@ class ShellWindow : public content::NotificationObserver,
     Frame frame;
 
     // Specify the initial content bounds of the window (excluding any window
-    // decorations). INT_MIN designates 'unspecified' for any coordinate, and
-    // should be replaced with a default value.
+    // decorations). INT_MIN designates 'unspecified' for the position
+    // components, and 0 for the size components. When unspecified, they should
+    // be replaced with a default value.
     gfx::Rect bounds;
 
     gfx::Size minimum_size;