Refactor to make BlimpLocationProvider accessible to content layer.

content/public/browser/content_browser_client.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_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 592 matching lines @@
   // Returns additional file system backends for FileSystem API.
   // |browser_context| is needed in the additional FileSystemBackends.
   // It has mount points to create objects returned by additional
   // FileSystemBackends, and SpecialStoragePolicy for permission granting.
   virtual void GetAdditionalFileSystemBackends(
       BrowserContext* browser_context,
       const base::FilePath& storage_partition_path,
       ScopedVector<storage::FileSystemBackend>* additional_backends) {}
 
   // Allows an embedder to return its own LocationProvider implementation.
   // Return nullptr to use the default one for the platform to be created.

[Wez, 2016/06/17 05:50:09]

This comment should really document that the caller takes ownership of the
returned LocationProvider, since that's not clear from the API name.

[CJ, 2016/06/21 22:16:07]

Done.

   // FYI: Used by an external project; please don't remove.
   // Contact Viatcheslav Ostapenko at sl.ostapenko@samsung.com for more
   // information.
   virtual LocationProvider* OverrideSystemLocationProvider();
 
+  // Returns true if the location API should use network-based
+  // location approximation in addition to the sytem provider, if any.

[Wez, 2016/06/17 05:50:09]

typo: sytem

[CJ, 2016/06/21 22:16:07]

Done.

+  virtual bool UseNetworkLocationProviders();
+
   // Creates a new DevToolsManagerDelegate. The caller owns the returned value.
   // It's valid to return nullptr.
   virtual DevToolsManagerDelegate* GetDevToolsManagerDelegate();
 
   // Creates a new TracingDelegate. The caller owns the returned value.
   // It's valid to return nullptr.
   virtual TracingDelegate* GetTracingDelegate();
 
   // Returns true if plugin referred to by the url can use
   // pp::FileIO::RequestOSFileHandle.
@@ skipping 143 matching lines @@
   // Allows an embedder to provide its own ExternalVideoSurfaceContainer
   // implementation.  Return nullptr to disable external surface video.
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_