Remove dimmed background (and accompanying animation) for global

search, since we should never really see that background anyway,
and I suspect the animation is using a significant amount of CPU.

core/java/android/app/SearchDialog.java

@@ -49,6 +49,7 @@ import android.text.TextUtils;
 import android.text.TextWatcher;
 import android.util.AttributeSet;
 import android.util.Log;
+import android.view.ContextThemeWrapper;
 import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -165,7 +166,7 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
      * @param context Application Context we can use for system acess
      */
     public SearchDialog(Context context) {
-        super(context, com.android.internal.R.style.Theme_SearchBar);
+        super(context, com.android.internal.R.style.Theme_GlobalSearchBar);
     }
 
     /**
@@ -393,6 +394,21 @@ public class SearchDialog extends Dialog implements OnItemClickListener, OnItemS
                 getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                         inputManager.showSoftInputUnchecked(0, null);
             }
+            
+            // The Dialog uses a ContextThemeWrapper for the context; use this to change the
+            // theme out from underneath us, between the global search theme and the in-app
+            // search theme. They are identical except that the global search theme does not
+            // dim the background of the window (because global search is full screen so it's
+            // not needed and this should save a little bit of time on global search invocation).
+            Object context = getContext();
+            if (context instanceof ContextThemeWrapper) {
+                ContextThemeWrapper wrapper = (ContextThemeWrapper) context;
+                if (globalSearch) {
+                    wrapper.setTheme(com.android.internal.R.style.Theme_GlobalSearchBar);
+                } else {
+                    wrapper.setTheme(com.android.internal.R.style.Theme_SearchBar);
+                }
+            }
             show();
         }
 

core/res/res/values/themes.xml

@@ -368,6 +368,12 @@
         <item name="android:backgroundDimEnabled">true</item>
         <item name="windowContentOverlay">@null</item>        
     </style>
+    
+    <!-- Theme for the search input bar when doing global search. The only
+         difference from non-global search is that we do not dim the background. -->
+    <style name="Theme.GlobalSearchBar" parent="Theme.Panel">
+        <item name="windowContentOverlay">@null</item>
+    </style>
 
     <!-- Menu Themes -->
     <eat-comment />