Add global and per-browser settings (issue #145).

This exposes the following new capabilities:
- Ability to disable drag & drop from other windows.
- Ability to specify additional plugin search paths.
- Ability to customize WebPreferences values, including enabling cross-site scripting.
- Ability to set User-Agent or product version.
- Ability to set default locale.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@144 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser_webview_delegate.cc

@@ -161,23 +161,6 @@ void TranslatePopupFeatures(const WebWindowFeatures& webKitFeatures,
 
 }  // namespace
 
-// WebViewDelegate -----------------------------------------------------------
-
-void BrowserWebViewDelegate::SetUserStyleSheetEnabled(bool is_enabled) {
-  WebPreferences* prefs = _Context->web_preferences();
-  prefs->user_style_sheet_enabled = is_enabled;
-  if (browser_->GetWebView())
-    prefs->Apply(browser_->GetWebView());
-}
-
-void BrowserWebViewDelegate::SetUserStyleSheetLocation(const GURL& location) {
-  WebPreferences* prefs = _Context->web_preferences();
-  prefs->user_style_sheet_enabled = true;
-  prefs->user_style_sheet_location = location;
-  if (browser_->GetWebView())
-    prefs->Apply(browser_->GetWebView());
-}
-
 // WebViewClient -------------------------------------------------------------
 
 WebView* BrowserWebViewDelegate::createView(WebFrame* creator,
@@ -912,7 +895,8 @@ void BrowserWebViewDelegate::RegisterDragDrop() {
 
 void BrowserWebViewDelegate::RevokeDragDrop() {
 #if defined(OS_WIN)
-  ::RevokeDragDrop(browser_->GetWebViewWndHandle());
+  if (drop_delegate_.get())
+    ::RevokeDragDrop(browser_->GetWebViewWndHandle());
 #endif
 }