Add transparency support to RenderWidgetHostView.

This is used to make the background behind toolstrips 'shine
through' them. It isn't possible to make them really transparent
due to cleartype (cleartype must know the pixels behind the text
to work), so instead we paint the background we want behind the
transparent webview.

Review URL: http://codereview.chromium.org/88076

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14378 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 1 deletions

diff --git a/webkit/glue/webview_impl.cc b/webkit/glue/webview_impl.cc
index 9906a27..0155b8b 100644
--- a/webkit/glue/webview_impl.cc
+++ b/webkit/glue/webview_impl.cc
@@ -366,7 +366,8 @@ WebViewImpl::WebViewImpl()
       drag_identity_(0),
       drop_effect_(DROP_EFFECT_DEFAULT),
       drop_accept_(false),
-      autocomplete_popup_showing_(false) {
+      autocomplete_popup_showing_(false),
+      is_transparent_(false) {
   // WebKit/win/WebView.cpp does the same thing, except they call the
   // KJS specific wrapper around this method. We need to have threading
   // initialized because CollatorICU requires it.
@@ -1825,6 +1826,14 @@ WebDevToolsAgentImpl* WebViewImpl::GetWebDevToolsAgentImpl() {
   return devtools_agent_.get();
 }
 
+void WebViewImpl::SetIsTransparent(bool is_transparent) {
+  is_transparent_ = is_transparent;
+}
+
+bool WebViewImpl::GetIsTransparent() const {
+  return is_transparent_;
+}
+
 void WebViewImpl::DidCommitLoad(bool* is_new_navigation) {
   if (is_new_navigation)
     *is_new_navigation = observed_new_navigation_;