Moved theme related state from BrowserInstantController to InstantService.

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 1817faa49f26da71b8b0462ef78f80abe7cdd52c..c8673acaa9f038149176e52c7e2bd5fba688bbd4 100644
--- a/chrome/common/instant_types.cc
+++ b/chrome/common/instant_types.cc
@@ -47,3 +47,16 @@ ThemeBackgroundInfo::ThemeBackgroundInfo()
 
 ThemeBackgroundInfo::~ThemeBackgroundInfo() {
 }
+
+bool ThemeBackgroundInfo::operator==(const ThemeBackgroundInfo& rhs) const {
+  return color_r == rhs.color_r &&
+      color_g == rhs.color_g &&
+      color_b == rhs.color_b &&
+      color_a == rhs.color_a &&
+      theme_id == rhs.theme_id &&
+      image_horizontal_alignment == rhs.image_horizontal_alignment &&
+      image_vertical_alignment == rhs.image_vertical_alignment &&
+      image_tiling == rhs.image_tiling &&
+      image_height == rhs.image_height &&
+      has_attribution == rhs.has_attribution;
+}