Don't spin the loading indicator for in-page navigations.

content/public/browser/web_contents.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 240 matching lines @@
   // this WebContents.
   virtual int32 GetMaxPageIDForSiteInstance(SiteInstance* site_instance) = 0;
 
   // Returns the SiteInstance associated with the current page.
   virtual SiteInstance* GetSiteInstance() const = 0;
 
   // Returns the SiteInstance for the pending navigation, if any.  Otherwise
   // returns the current SiteInstance.
   virtual SiteInstance* GetPendingSiteInstance() const = 0;
 
-  // Return whether this WebContents is loading a resource.
+  // Returns whether this WebContents is loading a resource.
   virtual bool IsLoading() const = 0;
 
+  // Returns whether this WebContents is loading and and the load is to a
+  // different top-level document (rather than being a navigation within the
+  // same document). This being true implies that IsLoading() is also true.
+  virtual bool IsLoadingToDifferentDocument() const = 0;
+
   // Returns whether this WebContents is waiting for a first-response for the
   // main resource of the page.
   virtual bool IsWaitingForResponse() const = 0;
 
-  // Return the current load state and the URL associated with it.
+  // Returns the current load state and the URL associated with it.
   virtual const net::LoadStateWithParam& GetLoadState() const = 0;
   virtual const base::string16& GetLoadStateHost() const = 0;
 
-  // Return the upload progress.
+  // Returns the upload progress.
   virtual uint64 GetUploadSize() const = 0;
   virtual uint64 GetUploadPosition() const = 0;
 
   // Returns a set of the site URLs currently committed in this tab.
   virtual std::set<GURL> GetSitesInTab() const = 0;
 
-  // Return the character encoding of the page.
+  // Returns the character encoding of the page.
   virtual const std::string& GetEncoding() const = 0;
 
   // True if this is a secure page which displayed insecure content.
   virtual bool DisplayedInsecureContent() const = 0;
 
   // Internal state ------------------------------------------------------------
 
   // Indicates whether the WebContents is being captured (e.g., for screenshots
   // or mirroring).  Increment calls must be balanced with an equivalent number
   // of decrement calls.  |capture_size| specifies the capturer's video
@@ skipping 315 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_