libcef: Update due to underlying chromium changes.

- External plugin loading support is now provided by webkit/glue/plugins so the libcef/plugins directory has been eliminated, with related changes.
- Modify the CefPluginInfo structure to use a more friendly data organization format.
- Remove CefUnregisterPlugin() as it is no longer functional.
- WebViewDelegate::ShowContextMenu() now receives the menu type as a bit-masked flag, so adjust the API accordingly.
- WebViewDelegate::GetContainingView() now returns a gfx::NativeViewId instead of a gfx::NativeView.
- Modify BrowserRequestContext because GetUserAgent() is now a virtual method of URLRequestContext.
- The data buffer in RequestProxy is now a net::IOBuffer.
- Add webkit_glue::GetScreenInfo().

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@10 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser_request_context.h

@@ -18,11 +18,13 @@ class BrowserRequestContext : public URLRequestContext {
   // Use an on-disk cache at the specified location.  Optionally, use the cache
   // in playback or record mode.
   BrowserRequestContext(const std::wstring& cache_path,
-                          net::HttpCache::Mode cache_mode,
-                          bool no_proxy);
+                        net::HttpCache::Mode cache_mode,
+                        bool no_proxy);
 
   ~BrowserRequestContext();
 
+  virtual const std::string& GetUserAgent(const GURL& url) const;
+
  private:
   void Init(const std::wstring& cache_path, net::HttpCache::Mode cache_mode,
             bool no_proxy);