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..de9358140b86f8ba9a19201e4cda95b4c7d39bbc 100644
--- a/chrome/common/instant_types.cc
+++ b/chrome/common/instant_types.cc
@@ -25,3 +25,17 @@ InstantAutocompleteResult::InstantAutocompleteResult() : relevance(0) {
 
 InstantAutocompleteResult::~InstantAutocompleteResult() {
 }
+
+ThemeBackgroundInfo::ThemeBackgroundInfo()
+    : color_r(0),
+      color_g(0),
+      color_b(0),
+      color_a(0),
+      image_horizontal_alignment(THEME_BKGRND_IMAGE_ALIGN_CENTER),
+      image_vertical_alignment(THEME_BKGRND_IMAGE_ALIGN_CENTER),
+      image_tiling(THEME_BKGRND_IMAGE_NO_REPEAT),
+      image_height(0) {
+}
+
+ThemeBackgroundInfo::~ThemeBackgroundInfo() {
+}