Combine tab background image getter code into one place.

chrome/browser/ui/views/tabs/tab_unittest.cc

 // 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.
 
 #include "chrome/browser/ui/views/tabs/tab.h"
 
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/tabs/tab_utils.h"
 #include "chrome/browser/ui/views/tabs/media_indicator_button.h"
 #include "chrome/browser/ui/views/tabs/tab_controller.h"
+#include "grit/theme_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/models/list_selection_model.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/widget/widget.h"
 
 using views::Widget;
 
 class FakeTabController : public TabController {
@@ skipping 31 matching lines @@
   void ContinueDrag(views::View* view, const ui::LocatedEvent& event) override {
   }
   bool EndDrag(EndDragReason reason) override { return false; }
   Tab* GetTabAt(Tab* tab, const gfx::Point& tab_in_tab_coordinates) override {
     return NULL;
   }
   void OnMouseEventInTab(views::View* source,
                          const ui::MouseEvent& event) override {}
   bool ShouldPaintTab(const Tab* tab, gfx::Rect* clip) override { return true; }
   bool IsImmersiveStyle() const override { return immersive_style_; }
+  int GetBackgroundResourceId(bool* custom_image) const override {
+    *custom_image = false;
+    return IDR_THEME_TAB_BACKGROUND;
+  }
   void UpdateTabAccessibilityState(const Tab* tab,
                                    ui::AXViewState* state) override{};
 
  private:
   ui::ListSelectionModel selection_model_;
   bool immersive_style_;
   bool active_tab_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeTabController);
 };
@@ skipping 333 matching lines @@
   EXPECT_EQ(50, tab.close_button_->bounds().height());
 }
 
 // Test in both a LTR and a RTL locale.  Note: The fact that the UI code is
 // configured for an RTL locale does *not* change how the coordinates are
 // examined in the tests above because views::View and friends are supposed to
 // auto-mirror the widgets when painting.  Thus, what we're testing here is that
 // there's no code in Tab that will erroneously subvert this automatic
 // coordinate translation.  http://crbug.com/384179
 INSTANTIATE_TEST_CASE_P(, TabTest, ::testing::Values(false, true));