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

chrome/common/instant_types.h

Index: chrome/common/instant_types.h
diff --git a/chrome/common/instant_types.h b/chrome/common/instant_types.h
index 627a565791f5e76828e00d17f4bb153dc564de7c..ddb4052ae37ccbff0e6f48bbf1b6eb2eaf163d04 100644
--- a/chrome/common/instant_types.h
+++ b/chrome/common/instant_types.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_COMMON_INSTANT_TYPES_H_
 #define CHROME_COMMON_INSTANT_TYPES_H_
 
+#include <string>
+
 #include "base/string16.h"
 #include "googleurl/src/gurl.h"
 
@@ -93,4 +95,52 @@ enum InstantShownReason {
   INSTANT_SHOWN_ZERO_SUGGESTIONS,
 };
 
+// The alignment of the theme background image.
+enum ThemeBackgroundImageAlignment {
+  THEME_BKGRND_IMAGE_ALIGN_CENTER,
+  THEME_BKGRND_IMAGE_ALIGN_LEFT,
+  THEME_BKGRND_IMAGE_ALIGN_TOP,
+  THEME_BKGRND_IMAGE_ALIGN_RIGHT,
+  THEME_BKGRND_IMAGE_ALIGN_BOTTOM,
+};
+
+// The tiling of the theme background image.
+enum ThemeBackgroundImageTiling {
+  THEME_BKGRND_IMAGE_NO_REPEAT,
+  THEME_BKGRND_IMAGE_REPEAT_X,
+  THEME_BKGRND_IMAGE_REPEAT_Y,
+  THEME_BKGRND_IMAGE_REPEAT,
+};
+
+struct ThemeBackgroundInfo {
+  ThemeBackgroundInfo();
+  ~ThemeBackgroundInfo();
+
+  // The theme background color in RGBA format where the R, G, B and A values
+  // are between 0 and 255 inclusive and always valid.
+  int color_r;
+  int color_g;
+  int color_b;
+  int color_a;
+
+  // The theme id for the theme background image.
+  // Value is only valid if there's a custom theme background image.
+  std::string theme_id;
+
+  // The theme background image horizontal alignment is only valid if |theme_id|
+  // is valid.
+  ThemeBackgroundImageAlignment image_horizontal_alignment;
+
+  // The theme background image vertical alignment is only valid if |theme_id|
+  // is valid.
+  ThemeBackgroundImageAlignment image_vertical_alignment;
+
+  // The theme background image tiling is only valid if |theme_id| is valid.
+  ThemeBackgroundImageTiling image_tiling;
+
+  // The theme background image height.
+  // Value is only valid if |theme_id| is valid.
+  uint16 image_height;
+};
+
 #endif  // CHROME_COMMON_INSTANT_TYPES_H_