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..456ac58c14f74ec0fba22318b3dd5b14d58dfef4 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 +95,32 @@ enum InstantShownReason {
   INSTANT_SHOWN_ZERO_SUGGESTIONS,
 };
 
+// Specifies information required for NTP Instant overlay to adopt the browser's
+// theme.
+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;

[palmer, 2012/11/19 22:23:20]

Wasn't A supposed to be a double between 0 and 1? (Having it be an int or a
double is fine by me for security purposes, of course. Do whatever works.)

[kuan, 2012/11/20 00:12:44]

the original type is an int, which i convert to double when i format the string.

+
+  // 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 alignment is only valid if |theme_id| is valid.
+  int image_alignment;
+
+  // The theme background image tiling is only valid if |theme_id| is valid.
+  int 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_