android: Expose content locks in RenderWidgetHostViewAndroid

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 382db082ec38eaec66f344b737c010195ad0ca3a..b36300e3bdd0ec73f98b5f34c60db3af25d0b8f2 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -1849,6 +1849,26 @@ void ContentViewCoreImpl::WebContentsDestroyed(WebContents* web_contents) {
   wcva->SetContentViewCore(NULL);
 }
 
+
+jboolean ContentViewCoreImpl::CanLockContent(JNIEnv* env, jobject obj) {
+  RenderWidgetHostViewAndroid* rwhva = GetRenderWidgetHostViewAndroid();
+  if (!rwhva || !rwhva->IsSurfaceAvailableForCopy() || !rwhva->IsShowing())
+    return false;
+  return true;
+}
+
+void ContentViewCoreImpl::LockContent(JNIEnv* env, jobject obj) {
+  RenderWidgetHostViewAndroid* rwhva = GetRenderWidgetHostViewAndroid();
+  if (rwhva)
+    rwhva->LockResources();
+}
+
+void ContentViewCoreImpl::UnlockContent(JNIEnv* env, jobject obj) {
+  RenderWidgetHostViewAndroid* rwhva = GetRenderWidgetHostViewAndroid();
+  if (rwhva)
+    rwhva->UnlockResources();
+}
+
 // This is called for each ContentView.
 jlong Init(JNIEnv* env,
            jobject obj,