Add WebView implementation for CookieManager.

android_webview/native/aw_browser_dependency_factory.h

Index: android_webview/native/aw_browser_dependency_factory.h
diff --git a/android_webview/native/aw_browser_dependency_factory.h b/android_webview/native/aw_browser_dependency_factory.h
index ebf03fd93558ccbcfc8feace1835d4869a488c3a..791406951538dbc2876c0b328b623f250631dbbd 100644
--- a/android_webview/native/aw_browser_dependency_factory.h
+++ b/android_webview/native/aw_browser_dependency_factory.h
@@ -8,6 +8,7 @@
 #include "base/basictypes.h"
 
 namespace content {
+class BrowserContext;
 class JavaScriptDialogCreator;
 class WebContents;
 }
@@ -35,6 +36,9 @@ class AwBrowserDependencyFactory {
   // Returns the singleton instance. |SetInstance| must have been called.
   static AwBrowserDependencyFactory* GetInstance();
 
+  // Returns the current browser context based on the specified mode.
+  virtual content::BrowserContext* GetBrowserContext(bool incognito) = 0;
+
   // Constructs and returns ownership of a WebContents instance.
   virtual content::WebContents* CreateWebContents(bool incognito) = 0;