Add an empty Android implementation of the PhysicalWebDataSource

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 885f04812d45d6da7b48abe4ffe1b21b584740e7..63b70ffbd411559c6c12c1c7ac75c68d0e06e27a 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -153,6 +153,7 @@ class BrowserProcessImpl : public BrowserProcess,
   memory::TabManager* GetTabManager() override;
   shell_integration::DefaultWebClientState CachedDefaultWebClientState()
       override;
+  PhysicalWebDataSource* GetPhysicalWebDataSource() override;
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
@@ -178,6 +179,7 @@ class BrowserProcessImpl : public BrowserProcess,
   void CreateStatusTray();
   void CreateBackgroundModeManager();
   void CreateGCMDriver();
+  void CreatePhysicalWebDataSource();
 
   void ApplyAllowCrossOriginAuthPromptPolicy();
   void ApplyDefaultBrowserPolicy();
@@ -344,6 +346,8 @@ class BrowserProcessImpl : public BrowserProcess,
 
   shell_integration::DefaultWebClientState cached_default_web_client_state_;
 
+  std::unique_ptr<PhysicalWebDataSource> physical_web_data_source_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };