[Mac] Enable "Edit Search Engines" in Omnibox context menu.

chrome/browser/cocoa/keyword_editor_cocoa_controller.h

Index: chrome/browser/cocoa/keyword_editor_cocoa_controller.h
diff --git a/chrome/browser/cocoa/keyword_editor_cocoa_controller.h b/chrome/browser/cocoa/keyword_editor_cocoa_controller.h
index 5f74a20eea33274857f5e5649afa3baa244d5ce5..213cf78e9e4ed3383c369536da11c40a6095af34 100644
--- a/chrome/browser/cocoa/keyword_editor_cocoa_controller.h
+++ b/chrome/browser/cocoa/keyword_editor_cocoa_controller.h
@@ -55,7 +55,11 @@ class KeywordEditorModelObserver : public TemplateURLModelObserver,
 }
 @property (readonly) KeywordEditorController* controller;
 
-- (id)initWithProfile:(Profile*)profile;
+// Show the keyword editor associated with the given profile (or the
+// original profile if this is an incognito profile).  If no keyword
+// editor exists for this profile, create one and show it.  Any
+// resulting editor releases itself when closed.
++ (void)showKeywordEditor:(Profile*)profile;
 
 // Message forwarded by KeywordEditorModelObserver.
 - (void)modelChanged;
@@ -65,3 +69,14 @@ class KeywordEditorModelObserver : public TemplateURLModelObserver,
 - (IBAction)makeDefault:(id)sender;
 
 @end
+
+@interface KeywordEditorCocoaController (TestingAPI)
+
+// Instances of this class are managed, use +showKeywordEditor:.
+- (id)initWithProfile:(Profile*)profile;
+
+// Returns a reference to the shared instance for the given profile,
+// or nil if there is none.
++ (KeywordEditorCocoaController*)sharedInstanceForProfile:(Profile*)profile;
+
+@end