Implement WebViewDatabase's hasFormData API for chromium based webview.

android_webview/browser/aw_browser_context.h

Index: android_webview/browser/aw_browser_context.h
diff --git a/android_webview/browser/aw_browser_context.h b/android_webview/browser/aw_browser_context.h
index 254a24775b953478cdd2b92111bfe3f1b28ea0c6..177c6122e9f5d9846fa29038ab8915ebfd6a32f0 100644
--- a/android_webview/browser/aw_browser_context.h
+++ b/android_webview/browser/aw_browser_context.h
@@ -32,8 +32,9 @@ class WebContents;
 
 namespace android_webview {
 
-class AwURLRequestContextGetter;
+class AwFormDatabaseService;
 class AwQuotaManagerBridge;
+class AwURLRequestContextGetter;
 class JniDependencyFactory;
 
 class AwBrowserContext : public content::BrowserContext,
@@ -67,6 +68,8 @@ class AwBrowserContext : public content::BrowserContext,
 
   AwQuotaManagerBridge* GetQuotaManagerBridge();
 
+  AwFormDatabaseService* GetFormDatabaseService();
+
   // content::BrowserContext implementation.
   virtual base::FilePath GetPath() OVERRIDE;
   virtual bool IsOffTheRecord() const OVERRIDE;
@@ -101,6 +104,7 @@ class AwBrowserContext : public content::BrowserContext,
   scoped_refptr<content::GeolocationPermissionContext>
       geolocation_permission_context_;
   scoped_ptr<AwQuotaManagerBridge> quota_manager_bridge_;
+  scoped_ptr<AwFormDatabaseService> form_database_service_;
 
   AwDownloadManagerDelegate download_manager_delegate_;