[iOS] Add Request Mobile Site cell to tools menu

ios/chrome/browser/tabs/tab.h

Index: ios/chrome/browser/tabs/tab.h
diff --git a/ios/chrome/browser/tabs/tab.h b/ios/chrome/browser/tabs/tab.h
index 14acb25a36751e499b1cdd6b9356af68082a9a22..1d49bf8fd4cffab56d752af3125c00d17ec1dadc 100644
--- a/ios/chrome/browser/tabs/tab.h
+++ b/ios/chrome/browser/tabs/tab.h
@@ -281,11 +281,15 @@ extern NSString* const kProxyPassthroughHeaderValue;
 
 // Update internal state to use the desktop user agent. Must call
 // -reloadWebViewAndURL for changes to take effect.
-- (void)enableDesktopUserAgent;

[liaoyuke, 2017/02/23 22:17:17]

I found "enable" confusing because it is already used in the tools menu to
represent if the "Request Desktop Site" is clickable.

+- (void)activateDesktopUserAgent;
 
-// Remove the UIWebView and reload the current url.  Used by request desktop
-// so the updated user agent is used.
-- (void)reloadForDesktopUserAgent;
+// Update internal state to use the mobile user agent. Must call
+// -reloadWebViewAndURL for changes to take effect.
+- (void)activateMobileUserAgent;
+
+// Remove the web view and reload the current url.  Used by request desktop or
+// mobile site, so the updated user agent is used.
+- (void)reloadForUpdatedUserAgent;
 
 // Ensures the toolbar visibility matches |visible|.
 - (void)updateFullscreenWithToolbarVisible:(BOOL)visible;