Have SearchProvider look up the omnibox start margin directly.

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_unittest.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
 
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #include "chrome/browser/ui/omnibox/omnibox_edit_controller.h"
 #include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
 #include "chrome/browser/ui/omnibox/omnibox_popup_view.h"
 #include "chrome/browser/ui/toolbar/toolbar_model_delegate.h"
 #include "chrome/browser/ui/toolbar/toolbar_model_impl.h"
 #include "testing/platform_test.h"
 #include "ui/gfx/image/image.h"
-#include "ui/gfx/rect.h"
 
 namespace {
 
 class MockOmniboxEditModel : public OmniboxEditModel {
  public:
   MockOmniboxEditModel(OmniboxView* view,
                        OmniboxEditController* controller,
                        Profile* profile)
       : OmniboxEditModel(view, controller, profile),
         up_or_down_count_(0) {
@@ skipping 64 matching lines @@
   virtual void OnSelectionBoundsChanged() OVERRIDE {}
   virtual void OnInputInProgress(bool in_progress) OVERRIDE {}
   virtual void OnKillFocus() OVERRIDE {}
   virtual void OnSetFocus() OVERRIDE {}
   virtual gfx::Image GetFavicon() const OVERRIDE { return gfx::Image(); }
   virtual string16 GetTitle() const OVERRIDE { return string16(); }
   virtual InstantController* GetInstant() OVERRIDE { return NULL; }
   virtual content::WebContents* GetWebContents() const OVERRIDE {
     return NULL;
   }
-  virtual gfx::Rect GetOmniboxBounds() const OVERRIDE { return gfx::Rect(); }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestingOmniboxEditController);
 };
 
 }  // namespace
 
 class OmniboxViewMacTest : public CocoaProfileTest {
  public:
   void SetModel(OmniboxViewMac* view, OmniboxEditModel* model) {
@@ skipping 83 matching lines @@
 
   // With popup open verify that pressing up and down arrow works.
   popup_view.set_is_open(true);
   model->set_up_or_down_count(0);
   view.OnDoCommandBySelector(@selector(moveDown:));
   EXPECT_EQ(1, model->up_or_down_count());
   model->set_up_or_down_count(0);
   view.OnDoCommandBySelector(@selector(moveUp:));
   EXPECT_EQ(-1, model->up_or_down_count());
 }