Update to Chromium revision 8cb76f56 (#307671)

- Linux/Mac: Load V8 initial snapshot from external bin files (see http://crbug.com/421063).
- Windows: 8.1 SDK is now required (issue #1470).
- Remove CefDOMDocument::GetSelectionStartNode and GetSelectionEndNode methods(see https://codereview.chromium.org/763043004).
- Rename internal namespace used in base headers to avoid linker conflicts with cef_sandbox.lib.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1956 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

patch/patches/browser_web_contents_1257.patch

@@ -1,8 +1,8 @@
 diff --git web_contents_impl.cc web_contents_impl.cc
-index 3119566..32c43dd 100644
+index ca9112a..80e2b75 100644
 --- web_contents_impl.cc
 +++ web_contents_impl.cc
-@@ -1153,22 +1153,29 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
+@@ -1152,22 +1152,29 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
        params.browser_context, params.site_instance, params.routing_id,
        params.main_frame_routing_id);
  
@@ -48,7 +48,7 @@ index 3119566..32c43dd 100644
    }
    CHECK(render_view_host_delegate_view_);
    CHECK(view_.get());
-@@ -1501,6 +1508,9 @@ void WebContentsImpl::CreateNewWindow(
+@@ -1502,6 +1509,9 @@ void WebContentsImpl::CreateNewWindow(
        static_cast<SessionStorageNamespaceImpl*>(session_storage_namespace);
    CHECK(session_storage_namespace_impl->IsFromContext(dom_storage_context));
  
@@ -58,7 +58,7 @@ index 3119566..32c43dd 100644
    if (delegate_ &&
        !delegate_->ShouldCreateWebContents(this,
                                            route_id,
-@@ -1508,7 +1518,9 @@ void WebContentsImpl::CreateNewWindow(
+@@ -1509,7 +1519,9 @@ void WebContentsImpl::CreateNewWindow(
                                            params.frame_name,
                                            params.target_url,
                                            partition_id,
@@ -69,7 +69,7 @@ index 3119566..32c43dd 100644
      if (route_id != MSG_ROUTING_NONE &&
          !RenderViewHost::FromID(render_process_id, route_id)) {
        // If the embedder didn't create a WebContents for this route, we need to
-@@ -1528,6 +1540,8 @@ void WebContentsImpl::CreateNewWindow(
+@@ -1529,6 +1541,8 @@ void WebContentsImpl::CreateNewWindow(
    create_params.main_frame_routing_id = main_frame_route_id;
    create_params.opener = this;
    create_params.opener_suppressed = params.opener_suppressed;