Upstream chromium side of modal dialogs for webview.

chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc

Index: chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
diff --git a/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc b/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
index 049fe5ff51c6df1c999fcd4effe4ecc00da7a1e9..4c361bc0a69f875f37083f4477006289a7a8d39e 100644
--- a/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
+++ b/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
@@ -38,8 +38,7 @@ using content::WebContents;
 namespace web_contents_delegate_android {
 
 WebContentsDelegateAndroid::WebContentsDelegateAndroid(JNIEnv* env, jobject obj)
-    : weak_java_delegate_(env, obj),
-      javascript_dialog_creator_(NULL) {
+    : weak_java_delegate_(env, obj) {
 }
 
 WebContentsDelegateAndroid::~WebContentsDelegateAndroid() {
@@ -336,11 +335,6 @@ bool WebContentsDelegateAndroid::TakeFocus(WebContents* source, bool reverse) {
       env, obj.obj(), reverse);
 }
 
-JavaScriptDialogCreator*
-    WebContentsDelegateAndroid::GetJavaScriptDialogCreator() {
-  return javascript_dialog_creator_;
-}
-
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------