diff --git a/cef1/CHROMIUM_BUILD_COMPATIBILITY.txt b/cef1/CHROMIUM_BUILD_COMPATIBILITY.txt
index 60d16519b..bb4227851 100644
--- a/cef1/CHROMIUM_BUILD_COMPATIBILITY.txt
+++ b/cef1/CHROMIUM_BUILD_COMPATIBILITY.txt
@@ -17,5 +17,5 @@
 
 {
   'chromium_url': 'http://src.chromium.org/svn/trunk/src',
-  'chromium_revision': '140240',
+  'chromium_revision': '142910',
 }
diff --git a/cef1/libcef/browser_dom_storage_system.cc b/cef1/libcef/browser_dom_storage_system.cc
index 7a99a2972..541c3f82c 100644
--- a/cef1/libcef/browser_dom_storage_system.cc
+++ b/cef1/libcef/browser_dom_storage_system.cc
@@ -107,7 +107,7 @@ WebStorageNamespace* BrowserDomStorageSystem::NamespaceImpl::copy() {
   int new_id = kInvalidNamespaceId;
   if (Context()) {
     new_id = Context()->AllocateSessionId();
-    Context()->CloneSessionNamespace(namespace_id_, new_id);
+    Context()->CloneSessionNamespace(namespace_id_, new_id, std::string());
   }
   return new NamespaceImpl(parent_, new_id);
 }
@@ -215,7 +215,7 @@ WebStorageNamespace* BrowserDomStorageSystem::CreateLocalStorageNamespace() {
 
 WebStorageNamespace* BrowserDomStorageSystem::CreateSessionStorageNamespace() {
   int id = context_->AllocateSessionId();
-  context_->CreateSessionNamespace(id);
+  context_->CreateSessionNamespace(id, std::string());
   return new NamespaceImpl(weak_factory_.GetWeakPtr(), id);
 }
 
diff --git a/cef1/libcef/browser_drag_delegate_win.cc b/cef1/libcef/browser_drag_delegate_win.cc
index df000450d..dcadee97f 100644
--- a/cef1/libcef/browser_drag_delegate_win.cc
+++ b/cef1/libcef/browser_drag_delegate_win.cc
@@ -279,12 +279,12 @@ void BrowserDragDelegate::DoDragging(const WebDropData& drop_data,
     // a shortcut so we add it first.
     if (!drop_data.file_contents.empty())
       PrepareDragForFileContents(drop_data, &data);
-    if (!drop_data.text_html.empty())
-      data.SetHtml(drop_data.text_html, drop_data.html_base_url);
+    if (!drop_data.html.is_null() && !drop_data.html.string().empty())
+      data.SetHtml(drop_data.html.string(), drop_data.html_base_url);
     // We set the text contents before the URL because the URL also sets text
     // content.
-    if (!drop_data.plain_text.empty())
-      data.SetString(drop_data.plain_text);
+    if (!drop_data.text.is_null() && !drop_data.text.string().empty())
+      data.SetString(drop_data.text.string());
     if (drop_data.url.is_valid())
       PrepareDragForUrl(drop_data, &data);
   }
diff --git a/cef1/libcef/browser_network_delegate.cc b/cef1/libcef/browser_network_delegate.cc
index 9d8d67422..547ffcb0b 100644
--- a/cef1/libcef/browser_network_delegate.cc
+++ b/cef1/libcef/browser_network_delegate.cc
@@ -104,3 +104,14 @@ bool BrowserNetworkDelegate::OnCanAccessFile(const net::URLRequest& request,
                                              const FilePath& path) const {
   return true;
 }
+
+bool BrowserNetworkDelegate::OnCanThrottleRequest(
+    const net::URLRequest& request) const {
+  return false;
+}
+
+int BrowserNetworkDelegate::OnBeforeSocketStreamConnect(
+    net::SocketStream* stream,
+    const net::CompletionCallback& callback) {
+  return net::OK;
+}
diff --git a/cef1/libcef/browser_network_delegate.h b/cef1/libcef/browser_network_delegate.h
index 3e9311cb9..e076afac4 100644
--- a/cef1/libcef/browser_network_delegate.h
+++ b/cef1/libcef/browser_network_delegate.h
@@ -51,6 +51,11 @@ class BrowserNetworkDelegate : public net::NetworkDelegate {
                               net::CookieOptions* options) OVERRIDE;
   virtual bool OnCanAccessFile(const net::URLRequest& request,
                                const FilePath& path) const OVERRIDE;
+  virtual bool OnCanThrottleRequest(
+      const net::URLRequest& request) const OVERRIDE;
+  virtual int OnBeforeSocketStreamConnect(
+      net::SocketStream* stream,
+      const net::CompletionCallback& callback) OVERRIDE;
 
   bool accept_all_cookies_;
 };
diff --git a/cef1/libcef/browser_resource_loader_bridge.cc b/cef1/libcef/browser_resource_loader_bridge.cc
index 8febc41c9..c279eef5a 100644
--- a/cef1/libcef/browser_resource_loader_bridge.cc
+++ b/cef1/libcef/browser_resource_loader_bridge.cc
@@ -1138,8 +1138,6 @@ class ResourceLoaderBridgeImpl : public ResourceLoaderBridge,
     static_cast<SyncRequestProxy*>(proxy_.get())->WaitForCompletion();
   }
 
-  virtual void UpdateRoutingId(int new_routing_id) OVERRIDE {}
-
  private:
   CefRefPtr<CefBrowserImpl> browser_;
 
diff --git a/cef1/libcef/drag_data_impl.cc b/cef1/libcef/drag_data_impl.cc
index 07dc1cb1f..c8f83f9b6 100644
--- a/cef1/libcef/drag_data_impl.cc
+++ b/cef1/libcef/drag_data_impl.cc
@@ -35,11 +35,11 @@ CefString CefDragDataImpl::GetLinkMetadata() {
 }
 
 CefString CefDragDataImpl::GetFragmentText() {
-  return data_.plain_text;
+  return data_.text.is_null() ? CefString() : data_.text.string();
 }
 
 CefString CefDragDataImpl::GetFragmentHtml() {
-  return data_.text_html;
+  return data_.html.is_null() ? CefString() : data_.html.string();
 }
 
 CefString CefDragDataImpl::GetFragmentBaseURL() {
diff --git a/cef1/libcef/web_drag_source_gtk.cc b/cef1/libcef/web_drag_source_gtk.cc
index 4b3eb8843..cc4d92589 100644
--- a/cef1/libcef/web_drag_source_gtk.cc
+++ b/cef1/libcef/web_drag_source_gtk.cc
@@ -79,14 +79,14 @@ void WebDragSource::StartDragging(const WebDropData& drop_data,
                                   const WebKit::WebPoint& image_offset) {
   drop_data_.reset(new WebDropData(drop_data));
   int targets_mask = 0;
-  if (!drop_data.plain_text.empty())
+  if (!drop_data.text.is_null() && !drop_data.text.string().empty())
     targets_mask |= ui::TEXT_PLAIN;
   if (drop_data.url.is_valid()) {
     targets_mask |= ui::TEXT_URI_LIST;
     targets_mask |= ui::CHROME_NAMED_URL;
     targets_mask |= ui::NETSCAPE_URL;
   }
-  if (!drop_data.text_html.empty())
+  if (!drop_data.html.is_null() && !drop_data.html.string().empty())
     targets_mask |= ui::TEXT_HTML;
   GtkTargetList* tl = ui::GetTargetListFromCodeMask(targets_mask);
 
@@ -125,14 +125,16 @@ void WebDragSource::OnDragDataGet(GtkWidget* sender, GdkDragContext* context,
                                   guint target_type, guint time) {
   switch (target_type) {
     case ui::TEXT_PLAIN: {
-      std::string utf8_text = UTF16ToUTF8(drop_data_->plain_text);
+      std::string utf8_text = drop_data_->text.is_null() ?
+          std::string() : UTF16ToUTF8(drop_data_->text.string());
       gtk_selection_data_set_text(selection_data, utf8_text.c_str(),
                                   utf8_text.length());
       break;
     }
 
     case ui::TEXT_HTML: {
-      std::string utf8_text = UTF16ToUTF8(drop_data_->text_html);
+      std::string utf8_text = drop_data_->html.is_null() ?
+          std::string() : UTF16ToUTF8(drop_data_->html.string());
       gtk_selection_data_set(selection_data,
                              ui::GetAtomForTarget(ui::TEXT_HTML),
                              8,
diff --git a/cef1/libcef/web_drag_source_mac.mm b/cef1/libcef/web_drag_source_mac.mm
index 47119c2f2..d6bae9130 100644
--- a/cef1/libcef/web_drag_source_mac.mm
+++ b/cef1/libcef/web_drag_source_mac.mm
@@ -153,9 +153,9 @@ void PromiseWriterHelper(const WebDropData& drop_data,
 
   // HTML.
   if ([type isEqualToString:NSHTMLPboardType]) {
-    DCHECK(!dropData_->text_html.empty());
+    DCHECK(!dropData_->html.is_null() && !dropData_->html.string().empty());
     // See comment on |kHtmlHeader| above.
-    [pboard setString:SysUTF16ToNSString(kHtmlHeader + dropData_->text_html)
+    [pboard setString:SysUTF16ToNSString(kHtmlHeader + dropData_->html.string())
               forType:NSHTMLPboardType];
 
   // URL.
@@ -202,8 +202,8 @@ void PromiseWriterHelper(const WebDropData& drop_data,
 
   // Plain text.
   } else if ([type isEqualToString:NSStringPboardType]) {
-    DCHECK(!dropData_->plain_text.empty());
-    [pboard setString:SysUTF16ToNSString(dropData_->plain_text)
+    DCHECK(!dropData_->text.is_null() && !dropData_->text.string().empty());
+    [pboard setString:SysUTF16ToNSString(dropData_->text.string())
               forType:NSStringPboardType];
 
   // Oops!
@@ -359,7 +359,7 @@ void PromiseWriterHelper(const WebDropData& drop_data,
   [pasteboard_ declareTypes:[NSArray array] owner:view_];
 
   // HTML.
-  if (!dropData_->text_html.empty())
+  if (!dropData_->html.is_null() && !dropData_->html.string().empty())
     [pasteboard_ addTypes:[NSArray arrayWithObject:NSHTMLPboardType]
                     owner:view_];
 
@@ -419,7 +419,7 @@ void PromiseWriterHelper(const WebDropData& drop_data,
   }
 
   // Plain text.
-  if (!dropData_->plain_text.empty())
+  if (!dropData_->text.is_null() && !dropData_->text.string().empty())
     [pasteboard_ addTypes:[NSArray arrayWithObject:NSStringPboardType]
                     owner:view_];
 }
diff --git a/cef1/libcef/web_drop_target_gtk.cc b/cef1/libcef/web_drop_target_gtk.cc
index bebf14107..25c8fbf55 100644
--- a/cef1/libcef/web_drop_target_gtk.cc
+++ b/cef1/libcef/web_drop_target_gtk.cc
@@ -186,7 +186,8 @@ void WebDropTarget::OnDragDataReceived(GtkWidget* widget,
         data->target == ui::GetAtomForTarget(ui::TEXT_PLAIN_NO_CHARSET)) {
       guchar* text = gtk_selection_data_get_text(data);
       if (text) {
-        drop_data_->plain_text = UTF8ToUTF16((const char*)text);
+        drop_data_->text =
+            NullableString16(UTF8ToUTF16((const char*)text), false);
         g_free(text);
       }
     } else if (data->target == ui::GetAtomForTarget(ui::TEXT_URI_LIST)) {
@@ -208,7 +209,7 @@ void WebDropTarget::OnDragDataReceived(GtkWidget* widget,
             // This is a hack. Some file managers also populate text/plain with
             // a file URL when dragging files, so we clear it to avoid exposing
             // it to the web content.
-            // drop_data_->plain_text.clear();
+            // drop_data_->text = NullableString16(true);
           } else if (!drop_data_->url.is_valid()) {
             // Also set the first non-file URL as the URL content for the drop.
             drop_data_->url = url;
@@ -217,9 +218,9 @@ void WebDropTarget::OnDragDataReceived(GtkWidget* widget,
         g_strfreev(uris);
       }
     } else if (data->target == ui::GetAtomForTarget(ui::TEXT_HTML)) {
-      drop_data_->text_html =
+      drop_data_->html = NullableString16(
           UTF8ToUTF16(std::string(reinterpret_cast<char*>(data->data),
-                                  data->length));
+                                  data->length)), false);
       // We leave the base URL empty.
     } else if (data->target == ui::GetAtomForTarget(ui::NETSCAPE_URL)) {
       std::string netscape_url(reinterpret_cast<char*>(data->data),
diff --git a/cef1/libcef/web_drop_target_mac.mm b/cef1/libcef/web_drop_target_mac.mm
index 76530186a..9aefc196a 100644
--- a/cef1/libcef/web_drop_target_mac.mm
+++ b/cef1/libcef/web_drop_target_mac.mm
@@ -221,17 +221,19 @@ using WebKit::WebView;
 
   // Get plain text.
   if ([types containsObject:NSStringPboardType]) {
-    data->plain_text =
-        base::SysNSStringToUTF16([pboard stringForType:NSStringPboardType]);
+    data->text = NullableString16(
+        base::SysNSStringToUTF16([pboard stringForType:NSStringPboardType]),
+        false);
   }
 
   // Get HTML. If there's no HTML, try RTF.
   if ([types containsObject:NSHTMLPboardType]) {
-    data->text_html =
-        base::SysNSStringToUTF16([pboard stringForType:NSHTMLPboardType]);
+    data->html = NullableString16(
+        base::SysNSStringToUTF16([pboard stringForType:NSHTMLPboardType]),
+        false);
   } else if ([types containsObject:NSRTFPboardType]) {
     NSString* html = [pboard htmlFromRtf];
-    data->text_html = base::SysNSStringToUTF16(html);
+    data->html = NullableString16(base::SysNSStringToUTF16(html), false);
   }
 
   // Get files.