alternate ntp: implement searchbox api for instant overlay to adopt themes

chrome/common/instant_types.cc

Index: chrome/common/instant_types.cc
diff --git a/chrome/common/instant_types.cc b/chrome/common/instant_types.cc
index 86b44612fabcc9a54108c16704a5d697cc124e5c..4aa2dd8780ab931b5fa181748339d47cccaa9307 100644
--- a/chrome/common/instant_types.cc
+++ b/chrome/common/instant_types.cc
@@ -25,3 +25,15 @@ InstantAutocompleteResult::InstantAutocompleteResult() : relevance(0) {
 
 InstantAutocompleteResult::~InstantAutocompleteResult() {
 }
+
+ThemeBackgroundInfo::ThemeBackgroundInfo() : color_r(0),
+                                             color_g(0),
+                                             color_b(0),
+                                             color_a(0),
+                                             image_alignment(0),
+                                             image_tiling(0),
+                                             image_height(0) {
+}
+
+ThemeBackgroundInfo::~ThemeBackgroundInfo() {
+}