Move Android user agent generation to native code

base/sys_info.h

Index: base/sys_info.h
diff --git a/base/sys_info.h b/base/sys_info.h
index c95415e40872786a6ab022c59ff906ab237841c6..6b14e66ff6bba65014168963581f353d6d0e3003 100644
--- a/base/sys_info.h
+++ b/base/sys_info.h
@@ -81,6 +81,9 @@ class BASE_EXPORT SysInfo {
 #endif // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)
+  // Returns a string containing detailed info about the environment.
+  static std::string OperatingSystemInformation();

[Charlie Reis, 2012/08/14 17:07:16]

Maybe move this near OperatingSystemName and OperatingSystemVersion above? 
(Perhaps with a comment about how it differs from them.  This is specifically
for user agent strings, right?)

Is there a reason it's Android specific, or are you planning to change that
later?  Sounds like it might be useful for
https://chromiumcodereview.appspot.com/10827146/.

[gone, 2012/08/14 17:31:01]

Moved it upwards in the following patch set.

It's used in two different places: the main use is for the user agent, but we
also display it in our about menu.  The latter use case is the other reason why
this is moving actually: this string was inaccessible from where we needed it
because of layer separation.

The call is guarded for Android for the moment; I'm still trying to figure out
how to expose it for http://crbug.com/128570, but I'll likely have to yank out
bits of the function for that CL.

+
   static int DalvikHeapSizeMB();
 #endif // defined(OS_ANDROID)
 };