android content shell bringup.

content/browser/android/content_view_client.cc

+// Copyright (c) 2010 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.
+
+#include "content/browser/android/content_view_client.h"
+
+#include <android/keycodes.h>
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "content/browser/android/content_util.h"
+#include "content/public/browser/content_view.h"

[jam, 2012/06/08 23:45:09]

nit: order

[jam, 2012/06/12 17:44:02]

?

[John Grabowski, 2012/06/13 22:12:29]

Done.

+#include "content/browser/android/download_controller.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/download_item.h"
+#include "content/public/browser/invalidate_type.h"
+#include "content/public/browser/page_navigator.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/find_match_rect_android.h"
+#include "content/public/common/page_transition_types.h"
+#include "content/public/common/referrer.h"
+#include "jni/content_view_client_jni.h"
+#include "net/http/http_request_headers.h"
+#include "ui/gfx/rect.h"
+#include "webkit/glue/window_open_disposition.h"
+
+using base::android::AttachCurrentThread;
+using base::android::CheckException;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::ConvertUTF16ToJavaString;
+using base::android::GetClass;
+using base::android::GetMethodID;
+using base::android::HasClass;
+using base::android::ScopedJavaLocalRef;
+using content::DownloadItem;
+using content::RenderViewHost;
+using content::WebContents;
+
+using namespace net;
+
+ContentViewClient::ContentViewClient(JNIEnv* env, jobject obj)
+    : weak_java_client_(env, obj),
+      find_helper_(NULL),
+      javascript_dialog_creator_(NULL) {
+}
+
+ContentViewClient::~ContentViewClient() {
+}
+
+// static
+ContentViewClient* ContentViewClient::CreateNativeContentViewClient(
+    JNIEnv* env, jobject obj) {
+  if (!obj)

[jam, 2012/06/08 23:45:09]

is this an error that shouldn't happen? if so, just DCHECK it it and don't
handle that error case

[jam, 2012/06/12 17:44:02]

?

[John Grabowski, 2012/06/13 22:12:29]

Done.

+    return NULL;
+
+  return new ContentViewClient(env, obj);
+}
+
+void ContentViewClient::OnInternalPageLoadRequest(
+    content::WebContents* source, const GURL& url) {
+  last_requested_navigation_url_ = url;
+}
+
+
+void ContentViewClient::OnPageStarted(const GURL& url) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, url.spec());
+  Java_ContentViewClient_onPageStarted(env, weak_java_client_.get(env).obj(),
+                                       jstring_url.obj());
+}
+
+void ContentViewClient::OnPageFinished(const GURL& url) {
+  if (url == last_requested_navigation_url_)
+    last_requested_navigation_url_ = GURL::EmptyGURL();
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, url.spec());
+
+  Java_ContentViewClient_onPageFinished(env, weak_java_client_.get(env).obj(),
+                                        jstring_url.obj());
+  CheckException(env);
+}
+
+void ContentViewClient::OnReceivedError(int error_code,
+                                       const string16& description,
+                                       const GURL& url) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_error_description =
+      ConvertUTF8ToJavaString(env, url.spec());
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, url.spec());
+
+  Java_ContentViewClient_onReceivedError(
+      env, weak_java_client_.get(env).obj(),
+      ToContentViewClientError(error_code),
+      jstring_error_description.obj(), jstring_url.obj());
+}
+
+void ContentViewClient::OnReceivedHttpAuthRequest(
+    jobject auth_handler,
+    const string16& host,
+    const string16& realm) {
+  /* TODO(jrg): upstream this once ContentHttpAuthHandler.java is
+     upstreamed, and onReceivedHttpAuthRequest() is upstreamed in
+     ContentViewClient.java */
+  NOTREACHED();
+}
+
+void ContentViewClient::OnDidCommitMainFrame(const GURL& url,
+                                             const GURL& base_url) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, url.spec());
+  ScopedJavaLocalRef<jstring> jstring_base_url =
+      ConvertUTF8ToJavaString(env, base_url.spec());
+
+  Java_ContentViewClient_onMainFrameCommitted(
+      env, weak_java_client_.get(env).obj(),
+      jstring_url.obj(), jstring_base_url.obj());
+}
+
+void ContentViewClient::OnInterstitialShown() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewClient_onInterstitialShown(
+      env, weak_java_client_.get(env).obj());
+}
+
+void ContentViewClient::OnInterstitialHidden() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewClient_onInterstitialHidden(
+      env, weak_java_client_.get(env).obj());
+}
+
+void ContentViewClient::SetFindHelper(FindHelper* find_helper) {
+  find_helper_ = find_helper;
+}
+
+void ContentViewClient::SetJavaScriptDialogCreator(
+    content::JavaScriptDialogCreator* javascript_dialog_creator) {
+  javascript_dialog_creator_ = javascript_dialog_creator;
+}
+
+bool ContentViewClient::OnJSModalDialog(content::JavaScriptMessageType type,
+                                        bool is_before_unload_dialog,
+                                        const GURL& url,
+                                        const string16& message,
+                                        const string16& default_value) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jurl(ConvertUTF8ToJavaString(env, url.spec()));
+  ScopedJavaLocalRef<jstring> jmessage(ConvertUTF16ToJavaString(env, message));
+
+  // Special case for beforeunload dialogs, as that isn't encoded in the
+  // |type| of the dialog.
+  if (is_before_unload_dialog) {
+    return Java_ContentViewClient_onJsBeforeUnload(env,
+        weak_java_client_.get(env).obj(),
+        jurl.obj(),
+        jmessage.obj());
+  }
+
+  switch (type) {
+    case content::JAVASCRIPT_MESSAGE_TYPE_ALERT:
+      return Java_ContentViewClient_onJsAlert(env,
+                                              weak_java_client_.get(env).obj(),
+                                              jurl.obj(),
+                                              jmessage.obj());
+
+    case content::JAVASCRIPT_MESSAGE_TYPE_CONFIRM:
+      return Java_ContentViewClient_onJsConfirm(env,
+          weak_java_client_.get(env).obj(),
+          jurl.obj(),
+          jmessage.obj());
+
+    case content::JAVASCRIPT_MESSAGE_TYPE_PROMPT: {
+      ScopedJavaLocalRef<jstring> jdefault_value(
+          ConvertUTF16ToJavaString(env, default_value));
+      return Java_ContentViewClient_onJsPrompt(env,
+                                               weak_java_client_.get(env).obj(),
+                                               jurl.obj(),
+                                               jmessage.obj(),
+                                               jdefault_value.obj());
+    }
+
+    default:
+      NOTREACHED();
+      return false;
+  }
+}
+
+// ----------------------------------------------------------------------------
+// WebContentsDelegate methods
+// ----------------------------------------------------------------------------
+
+// OpenURLFromTab() will be called when we're performing a browser-intiated
+// navigation. The most common scenario for this is opening new tabs (see
+// RenderViewImpl::decidePolicyForNavigation for more details).
+WebContents* ContentViewClient::OpenURLFromTab(
+    WebContents* source,
+    const content::OpenURLParams& params) {
+  const GURL& url = params.url;
+  WindowOpenDisposition disposition = params.disposition;
+  content::PageTransition transition(
+      content::PageTransitionFromInt(params.transition));
+
+  if (!source || (disposition != CURRENT_TAB &&
+                  disposition != NEW_FOREGROUND_TAB &&
+                  disposition != NEW_BACKGROUND_TAB &&
+                  disposition != OFF_THE_RECORD)) {
+    NOTIMPLEMENTED();
+    return NULL;
+  }
+
+  if (disposition == NEW_FOREGROUND_TAB ||
+      disposition == NEW_BACKGROUND_TAB ||
+      disposition == OFF_THE_RECORD) {
+    JNIEnv* env = AttachCurrentThread();
+    ScopedJavaLocalRef<jstring> java_url =
+        ConvertUTF8ToJavaString(env, url.spec());
+    Java_ContentViewClient_openNewTab(env,
+                                      weak_java_client_.get(env).obj(),
+                                      java_url.obj(),
+                                      disposition == OFF_THE_RECORD);
+    return NULL;
+  }
+
+  // TODO(mkosiba): This should be in platform_utils OpenExternal, b/6174564.
+  if (transition == content::PAGE_TRANSITION_LINK &&
+      ShouldOverrideLoading(url))
+    return NULL;
+
+  source->GetController().LoadURL(url, params.referrer, transition,
+                                  std::string());
+  return source;
+}
+
+// ShouldIgnoreNavigation will be called for every non-local top level
+// navigation made by the renderer. If true is returned the renderer will
+// not perform the navigation. This is done by using synchronous IPC so we
+// should avoid blocking calls from this method.
+bool ContentViewClient::ShouldIgnoreNavigation(
+    WebContents* source,
+    const GURL& url,
+    const content::Referrer& referrer,
+    WindowOpenDisposition disposition,
+    content::PageTransition transition_type) {
+
+  // Don't override new tabs.
+  if (disposition == NEW_FOREGROUND_TAB ||
+      disposition == NEW_BACKGROUND_TAB ||
+      disposition == OFF_THE_RECORD)
+    return false;
+
+  // Don't override the navigation that has just been requested via the
+  // ContentView.loadUrl method.
+  if (url == last_requested_navigation_url_) {
+    last_requested_navigation_url_ = GURL::EmptyGURL();
+    return false;
+  }
+
+  return ShouldOverrideLoading(url);
+}
+
+void ContentViewClient::NavigationStateChanged(
+    const WebContents* source, unsigned changed_flags) {
+  if (changed_flags & (
+      content::INVALIDATE_TYPE_TAB | content::INVALIDATE_TYPE_TITLE)) {
+    JNIEnv* env = AttachCurrentThread();
+    Java_ContentViewClient_onTabHeaderStateChanged(
+        env, weak_java_client_.get(env).obj());
+  }
+}
+
+void ContentViewClient::AddNewContents(WebContents* source,
+                                       WebContents* new_contents,
+                                       WindowOpenDisposition disposition,
+                                       const gfx::Rect& initial_pos,
+                                       bool user_gesture) {
+  JNIEnv* env = AttachCurrentThread();
+  bool handled = Java_ContentViewClient_addNewContents(
+      env,
+      weak_java_client_.get(env).obj(),
+      reinterpret_cast<jint>(source),
+      reinterpret_cast<jint>(new_contents),
+      static_cast<jint>(disposition),
+      NULL,
+      user_gesture);
+  if (!handled)
+    delete new_contents;
+}
+
+void ContentViewClient::ActivateContents(WebContents* contents) {
+  // TODO(dtrainor) When doing the merge I came across this.  Should we be
+  // activating this tab here?
+}
+
+void ContentViewClient::DeactivateContents(WebContents* contents) {
+  // Do nothing.
+}
+
+void ContentViewClient::LoadingStateChanged(WebContents* source) {
+  JNIEnv* env = AttachCurrentThread();
+  bool has_stopped = source == NULL || !source->IsLoading();
+
+  if (has_stopped)
+    Java_ContentViewClient_onLoadStopped(
+        env, weak_java_client_.get(env).obj());
+  else
+    Java_ContentViewClient_onLoadStarted(
+        env, weak_java_client_.get(env).obj());
+}
+
+void ContentViewClient::LoadProgressChanged(double progress) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewClient_onLoadProgressChanged(
+      env,
+      weak_java_client_.get(env).obj(),
+      progress);
+}
+
+void ContentViewClient::CloseContents(WebContents* source) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewClient_closeContents(env, weak_java_client_.get(env).obj());
+}
+
+void ContentViewClient::MoveContents(WebContents* source,
+                                    const gfx::Rect& pos) {
+  // Do nothing.
+}
+
+// TODO(merge): WARNING! method no longer available on the base class.
+// See http://b/issue?id=5862108
+void ContentViewClient::URLStarredChanged(WebContents* source, bool starred) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewClient_onUrlStarredChanged(env,
+                                             weak_java_client_.get(env).obj(),
+                                             starred);
+}
+
+// This is either called from TabContents::DidNavigateMainFramePostCommit() with
+// an empty GURL or responding to RenderViewHost::OnMsgUpateTargetURL(). In
+// Chrome, the latter is not always called, especially not during history
+// navigation. So we only handle the first case and pass the source TabContents'
+// url to Java to update the UI.
+void ContentViewClient::UpdateTargetURL(WebContents* source,
+                                        int32 page_id,
+                                        const GURL& url) {
+  if (url.is_empty()) {
+    JNIEnv* env = AttachCurrentThread();
+    ScopedJavaLocalRef<jstring> java_url =
+        ConvertUTF8ToJavaString(env, source->GetURL().spec());
+    Java_ContentViewClient_onUpdateUrl(env,
+                                       weak_java_client_.get(env).obj(),
+                                       java_url.obj());
+  }
+}
+
+bool ContentViewClient::CanDownload(RenderViewHost* source,
+                                    int request_id,
+                                    const std::string& request_method) {
+  if (request_method == net::HttpRequestHeaders::kGetMethod) {
+    content::DownloadController::GetInstance()->CreateGETDownload(
+        source, request_id);
+    return false;
+  }
+  return true;
+}
+
+void ContentViewClient::OnStartDownload(WebContents* source,
+                                        DownloadItem* download) {
+  content::DownloadController::GetInstance()->OnPostDownloadStarted(
+      source, download);
+}
+
+void ContentViewClient::FindReply(WebContents* web_contents,
+                                  int request_id,
+                                  int number_of_matches,
+                                  const gfx::Rect& selection_rect,
+                                  int active_match_ordinal,
+                                  bool final_update) {
+  /* TODO(jrg): upstream this; requires
+     content/browser/android/find_helper.h to be upstreamed */
+}
+
+void ContentViewClient::OnReceiveFindMatchRects(
+    int version, const std::vector<FindMatchRect>& rects,
+    const FindMatchRect& active_rect) {
+  JNIEnv* env = AttachCurrentThread();
+
+  // Constructs an float[] of (left, top, right, bottom) tuples and passes it on
+  // to the Java onReceiveFindMatchRects handler which will use it to create
+  // RectF objects equivalent to the std::vector<FindMatchRect>.
+  ScopedJavaLocalRef<jfloatArray> rect_data(env,
+      env->NewFloatArray(rects.size() * 4));
+  jfloat* rect_data_floats = env->GetFloatArrayElements(rect_data.obj(), NULL);
+  for (size_t i = 0; i < rects.size(); ++i) {
+    rect_data_floats[4 * i]     = rects[i].left;
+    rect_data_floats[4 * i + 1] = rects[i].top;
+    rect_data_floats[4 * i + 2] = rects[i].right;
+    rect_data_floats[4 * i + 3] = rects[i].bottom;
+  }
+  env->ReleaseFloatArrayElements(rect_data.obj(), rect_data_floats, 0);
+
+  ScopedJavaLocalRef<jobject> active_rect_object;
+  if (active_rect.left < active_rect.right &&
+      active_rect.top < active_rect.bottom) {
+    ScopedJavaLocalRef<jclass> rect_clazz =
+        GetClass(env, "android/graphics/RectF");
+    jmethodID rect_constructor =
+        GetMethodID(env, rect_clazz, "<init>", "(FFFF)V");
+    active_rect_object.Reset(env, env->NewObject(rect_clazz.obj(),
+                                                 rect_constructor,
+                                                 active_rect.left,
+                                                 active_rect.top,
+                                                 active_rect.right,
+                                                 active_rect.bottom));
+    DCHECK(!active_rect_object.is_null());
+  }
+
+
+  Java_ContentViewClient_onReceiveFindMatchRects(
+      env,
+      weak_java_client_.get(env).obj(),
+      version, rect_data.obj(),
+      active_rect_object.obj());
+}
+
+bool ContentViewClient::ShouldOverrideLoading(const GURL& url) {
+  if (!url.is_valid())
+    return false;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, url.spec());
+  bool ret = Java_ContentViewClient_shouldOverrideUrlLoading(
+      env, weak_java_client_.get(env).obj(), jstring_url.obj());
+  return ret;
+}
+
+void ContentViewClient::HandleKeyboardEvent(
+    const NativeWebKeyboardEvent& event) {
+  /* TODO(jrg): to upstream this implementation, we need these files as well:
+     browser/android/ime_helper.cc
+     browser/android/ime_helper.h
+     browser/renderer_host/native_web_keyboard_event_android.h
+     browser/renderer_host/native_web_keyboard_event_android.cc
+     Also the @CalledByNative handleKeyboardEvent() in ContentViewClient.java.
+  */
+  NOTREACHED();
+}
+
+bool ContentViewClient::TakeFocus(bool reverse) {
+  JNIEnv* env = AttachCurrentThread();
+  return Java_ContentViewClient_takeFocus(env,
+                                          weak_java_client_.get(env).obj(),
+                                          reverse);
+}
+
+ContentViewClientError ContentViewClient::ToContentViewClientError(int netError)
+{

[jam, 2012/06/08 23:45:09]

nit: brace in above line

[jam, 2012/06/12 17:44:02]

this is still not according to style guide, i.e 80 chars and brace bracket not
on previous line

[John Grabowski, 2012/06/13 22:12:29]

Done.

+    // Note: many net::Error constants don't have an obvious mapping.
+    // These will be handled by the default case, ERROR_UNKNOWN.
+    switch(netError) {
+        case ERR_UNSUPPORTED_AUTH_SCHEME:

[jam, 2012/06/08 23:45:09]

nit: here and below, 2 space indents

[jam, 2012/06/12 17:44:02]

?

[John Grabowski, 2012/06/13 22:12:29]

Done.  (sorry looks like I missed this whole file on review)

+            return ERROR_UNSUPPORTED_AUTH_SCHEME;
+
+        case ERR_INVALID_AUTH_CREDENTIALS:
+        case ERR_MISSING_AUTH_CREDENTIALS:
+        case ERR_MISCONFIGURED_AUTH_ENVIRONMENT:
+            return ERROR_AUTHENTICATION;
+
+        case ERR_TOO_MANY_REDIRECTS:
+            return ERROR_REDIRECT_LOOP;
+
+        case ERR_UPLOAD_FILE_CHANGED:
+            return ERROR_FILE_NOT_FOUND;
+
+        case ERR_INVALID_URL:
+            return ERROR_BAD_URL;
+
+        case ERR_DISALLOWED_URL_SCHEME:
+        case ERR_UNKNOWN_URL_SCHEME:
+            return ERROR_UNSUPPORTED_SCHEME;
+
+        case ERR_IO_PENDING:
+        case ERR_NETWORK_IO_SUSPENDED:
+            return ERROR_IO;
+
+        case ERR_CONNECTION_TIMED_OUT:
+        case ERR_TIMED_OUT:
+            return ERROR_TIMEOUT;
+
+        case ERR_FILE_TOO_BIG:
+            return ERROR_FILE;
+
+        case ERR_HOST_RESOLVER_QUEUE_TOO_LARGE:
+        case ERR_INSUFFICIENT_RESOURCES:
+        case ERR_OUT_OF_MEMORY:
+            return ERROR_TOO_MANY_REQUESTS;
+
+        case ERR_CONNECTION_CLOSED:
+        case ERR_CONNECTION_RESET:
+        case ERR_CONNECTION_REFUSED:
+        case ERR_CONNECTION_ABORTED:
+        case ERR_CONNECTION_FAILED:
+        case ERR_SOCKET_NOT_CONNECTED:
+            return ERROR_CONNECT;
+
+        case ERR_INTERNET_DISCONNECTED:
+        case ERR_ADDRESS_INVALID:
+        case ERR_ADDRESS_UNREACHABLE:
+        case ERR_NAME_NOT_RESOLVED:
+        case ERR_NAME_RESOLUTION_FAILED:
+            return ERROR_HOST_LOOKUP;
+
+        case ERR_SSL_PROTOCOL_ERROR:
+        case ERR_SSL_CLIENT_AUTH_CERT_NEEDED:
+        case ERR_TUNNEL_CONNECTION_FAILED:
+        case ERR_NO_SSL_VERSIONS_ENABLED:
+        case ERR_SSL_VERSION_OR_CIPHER_MISMATCH:
+        case ERR_SSL_RENEGOTIATION_REQUESTED:
+        case ERR_CERT_ERROR_IN_SSL_RENEGOTIATION:
+        case ERR_BAD_SSL_CLIENT_AUTH_CERT:
+        case ERR_SSL_NO_RENEGOTIATION:
+        case ERR_SSL_DECOMPRESSION_FAILURE_ALERT:
+        case ERR_SSL_BAD_RECORD_MAC_ALERT:
+        case ERR_SSL_UNSAFE_NEGOTIATION:
+        case ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY:
+        case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED:
+        case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY:
+            return ERROR_FAILED_SSL_HANDSHAKE;
+
+        case ERR_PROXY_AUTH_UNSUPPORTED:
+        case ERR_PROXY_AUTH_REQUESTED:
+        case ERR_PROXY_CONNECTION_FAILED:
+        case ERR_UNEXPECTED_PROXY_AUTH:
+            return ERROR_PROXY_AUTHENTICATION;
+
+        /* The certificate errors are handled by onReceivedSslError
+         * and don't need to be reported here.
+         */
+        case ERR_CERT_COMMON_NAME_INVALID:
+        case ERR_CERT_DATE_INVALID:
+        case ERR_CERT_AUTHORITY_INVALID:
+        case ERR_CERT_CONTAINS_ERRORS:
+        case ERR_CERT_NO_REVOCATION_MECHANISM:
+        case ERR_CERT_UNABLE_TO_CHECK_REVOCATION:
+        case ERR_CERT_REVOKED:
+        case ERR_CERT_INVALID:
+        case ERR_CERT_WEAK_SIGNATURE_ALGORITHM:
+        case ERR_CERT_NOT_IN_DNS:
+        case ERR_CERT_NON_UNIQUE_NAME:
+            return ERROR_OK;
+
+        default:
+            VLOG(1) << "ContentViewClient::ToContentViewClientError: Unknown "
+                    << "chromium error: "
+                    << netError;
+            return ERROR_UNKNOWN;
+    }
+}
+
+content::JavaScriptDialogCreator*
+    ContentViewClient::GetJavaScriptDialogCreator() {
+  return javascript_dialog_creator_;
+}
+
+void ContentViewClient::RunFileChooser(
+    WebContents* tab, const content::FileChooserParams& params) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> jparams = ToJavaFileChooserParams(env, params);
+  Java_ContentViewClient_runFileChooser(env, weak_java_client_.get(env).obj(),
+                                        jparams.obj());
+}
+
+// ----------------------------------------------------------------------------
+// Native JNI methods
+// ----------------------------------------------------------------------------
+
+// Register native methods
+
+bool RegisterContentViewClient(JNIEnv* env) {
+  if (!HasClass(env, kContentViewClientClassPath)) {
+    DLOG(ERROR) << "Unable to find class ContentViewClient!";
+    return false;
+  }
+  return RegisterNativesImpl(env);
+}