Moved theme related state from BrowserInstantController to InstantService.

chrome/test/data/instant_extended.html

Index: chrome/test/data/instant_extended.html
diff --git a/chrome/test/data/instant_extended.html b/chrome/test/data/instant_extended.html
index acff3da4714399ce2ecd8624969cca9bbebcd7d8..ecf58217dfca98527a9ec8ad000a0ee90e4e4a55 100644
--- a/chrome/test/data/instant_extended.html
+++ b/chrome/test/data/instant_extended.html
@@ -21,6 +21,7 @@ var onFocusChangedCalls = 0;
 var onToggleVoiceSearchCalls = 0;
 var isFocused = false;
 var onvisibilitycalls = 0;
+var onThemeChangedCalls = 0;
 
 function getApiHandle() {
   if (window.navigator && window.navigator.searchBox)
@@ -117,6 +118,10 @@ function handleToggleVoiceSearch() {
   onToggleVoiceSearchCalls++;
 }
 
+function handleThemeChange() {
+  onThemeChangedCalls++;
+}
+
 function setUp() {
   apiHandle = getApiHandle();
   if (!apiHandle)
@@ -130,6 +135,7 @@ function setUp() {
   apiHandle.onfocuschange = handleFocusChange;
   apiHandle.ontogglevoicesearch = handleToggleVoiceSearch;
   newTabPageHandle.onmostvisitedchange = handleMostVisitedChange;
+  newTabPageHandle.onthemechange = handleThemeChange;
   if (apiHandle.value) {
     handleNativeSuggestions();
     handleOnChange();