Adapted the client to use new Browser API

The contribution allows the client to utilize the new API from SWT
Browser to check if the url is the custom text url of the browser.

Contributes to #213

ua/org.eclipse.ui.intro/src/org/eclipse/ui/internal/intro/impl/presentations/BrowserIntroPartImplementation.java

@@ -641,10 +641,12 @@ protected void saveCurrentPage(IMemento memento) {
 			return;
 		// Handle the case where we are on a static page.
 		// browser.getURL() returns the empty string if there is no current URL
-		// and returns "about:blank" if we are on a dynamic page
+		// and returns Browser's BASE_URL if we are on a dynamic page
+		// Also Handles the case where we use browser's base
+		// HTML which we do not want to cache.
 		if (browser != null && browser.getUrl() != null
 				&& browser.getUrl().length() > 0
-				&& !(browser.getUrl().equals("about:blank")) //$NON-NLS-1$
+				&& !browser.isLocationForCustomText(browser.getUrl())
 				&& !(browser.getUrl().equals("file:///"))) { //$NON-NLS-1$
 
 			String currentURL = browser.getUrl();