Refactor [FramedBrowserWindow drawWindowThemeInDirtyRect:] to use themeImagePositionForAlignment:

chrome/browser/ui/cocoa/tabs/tab_view.mm

Index: chrome/browser/ui/cocoa/tabs/tab_view.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_view.mm b/chrome/browser/ui/cocoa/tabs/tab_view.mm
index 99985d921e7e1bf7bd669f35a546cfd6623d4a9b..2379778d255c768f40f34858f59255092a249e9c 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_view.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_view.mm
@@ -324,9 +324,9 @@ const CGFloat kRapidCloseDist = 2.5;
 
   ThemeService* themeProvider =
       static_cast<ThemeService*>([[self window] themeProvider]);
-  NSPoint phase = [[self window]
-      themePatternPhaseForAlignment: THEME_PATTERN_ALIGN_WITH_TAB_STRIP];
-  [context cr_setPatternPhase:phase forView:self];
+  NSPoint position = [[self window]
+      themeImagePositionForAlignment: THEME_IMAGE_ALIGN_WITH_TAB_STRIP];
+  [context cr_setPatternPhase:position forView:self];
 
   CGImageRef mask([self tabClippingMask]);
   CGRect maskBounds = CGRectMake(0, 0, maskCacheWidth_, kMaskHeight);