Start hooking up "element.requestFullscreen()" in chrome for android.

chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.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 CHROME_BROWSER_COMPONENT_WEB_CONTENTS_DELEGATE_ANDROID_WEB_CONTENTS_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_COMPONENT_WEB_CONTENTS_DELEGATE_ANDROID_WEB_CONTENTS_DELEGATE_ANDROID_H_
 
 #include "base/android/jni_helper.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
@@ skipping 75 matching lines @@
                                int32 page_id,
                                const GURL& url) OVERRIDE;
   virtual void HandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual bool TakeFocus(content::WebContents* source, bool reverse) OVERRIDE;
 
   virtual void ShowRepostFormWarningDialog(
       content::WebContents* source) OVERRIDE;
 
+  virtual void ToggleFullscreenModeForTab(content::WebContents* web_contents,
+                                          bool enter_fullscreen) OVERRIDE;
+  virtual bool IsFullscreenForTabOrPending(
+      const content::WebContents* web_contents) const OVERRIDE;
+
  protected:
   base::android::ScopedJavaLocalRef<jobject> GetJavaDelegate(JNIEnv* env) const;
 
  private:
   // We depend on the java side user of WebContentDelegateAndroid to hold a
   // strong reference to that object as long as they want to receive callbacks
   // on it. Using a weak ref here allows it to be correctly GCed.
   JavaObjectWeakGlobalRef weak_java_delegate_;
 };
 
 bool RegisterWebContentsDelegateAndroid(JNIEnv* env);
 
 }  // namespace web_contents_delegate_android
 
 #endif  // CHROME_BROWSER_COMPONENT_WEB_CONTENTS_DELEGATE_ANDROID_WEB_CONTENTS_DELEGATE_ANDROID_H_