Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h

Index: chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h
diff --git a/chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.h b/chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h
similarity index 68%
rename from chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.h
rename to chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h
index d2922c7695f44d308c033371a1e93af7a5d34e91..48a398756cd6fea303a6c667ca54ccd0aa809337 100644
--- a/chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view.h
+++ b/chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h
@@ -4,8 +4,8 @@
 
 #import <Cocoa/Cocoa.h>
 
-// A view used to draw a drop shadow beneath the instant preview view.
-@interface PreviewDropShadowView : NSView {
+// A view used to draw a drop shadow beneath the Instant overlay view.
+@interface OverlayDropShadowView : NSView {
 }
 
 + (CGFloat)preferredHeight;