Move [Provisional]DataSource accessors/methods from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebLocalFrame.h

Index: third_party/WebKit/public/web/WebLocalFrame.h
diff --git a/third_party/WebKit/public/web/WebLocalFrame.h b/third_party/WebKit/public/web/WebLocalFrame.h
index e768600fd6366332fb1e07ce54872a1e17e1e57a..06118a8007c071d3c42e8f34cbaa6613fe853e9e 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -26,6 +26,7 @@ class InterfaceRegistry;
 class WebAutofillClient;
 class WebContentSettingsClient;
 class WebData;
+class WebDataSource;
 class WebDevToolsAgent;
 class WebDevToolsAgentClient;
 class WebDoubleSize;
@@ -178,6 +179,12 @@ class WebLocalFrame : public WebFrame {
                         WebHistoryLoadType = kWebHistoryDifferentDocumentLoad,
                         bool is_client_redirect = false) = 0;
 
+  // Returns the data source that is currently loading.  May be null.
+  virtual WebDataSource* ProvisionalDataSource() const = 0;
+
+  // Returns the data source that is currently loaded.
+  virtual WebDataSource* DataSource() const = 0;
+
   enum FallbackContentResult {
     // An error page should be shown instead of fallback.
     NoFallbackContent,