[content shell] add support for entering/exiting fullscreen mode for layout test

content/shell/shell_android.cc

Index: content/shell/shell_android.cc
diff --git a/content/shell/shell_android.cc b/content/shell/shell_android.cc
index 5fb8cb0828b7a0943481c3ee3af2907eef7fe9bc..66663e03d29793406da28cc5d60f58feb060a050 100644
--- a/content/shell/shell_android.cc
+++ b/content/shell/shell_android.cc
@@ -66,14 +66,15 @@ void Shell::LoadProgressChanged(WebContents* source, double progress) {
   Java_Shell_onLoadProgressChanged(env, java_object_.obj(), progress);
 }
 
-void Shell::ToggleFullscreenModeForTab(WebContents* web_contents,
-                                       bool enter_fullscreen) {
+void Shell::PlatformToggleFullscreenModeForTab(WebContents* web_contents,
+                                               bool enter_fullscreen) {
   JNIEnv* env = AttachCurrentThread();
   Java_Shell_toggleFullscreenModeForTab(
       env, java_object_.obj(), enter_fullscreen);
 }
 
-bool Shell::IsFullscreenForTabOrPending(const WebContents* web_contents) const {
+bool Shell::PlatformIsFullscreenForTabOrPending(
+    const WebContents* web_contents) const {
   JNIEnv* env = AttachCurrentThread();
   return Java_Shell_isFullscreenForTabOrPending(env, java_object_.obj());
 }