Update to Chromium revision 6e53600d (#386251)

- Remove |accept_lang| parameter from CefJSDialogHandler::OnJSDialog
  and CefFormatUrlForSecurityDisplay (see https://crbug.com/336973#c36).
- Remove remaining NPAPI-related code including functions from
  cef_web_plugin.h (see https://crbug.com/493212#c55).
- Mac: 10.7+ deployment target is now required for client applications.
- Mac: Remove CefBrowserHost::SetWindowVisibility (issue #1375). No
  replacement is required for windowed rendering. Use WasHidden for
  off-screen rendering.
- Windows: Visual Studio 2015 Update 2 is now required when building
  CEF/Chromium.

libcef/browser/browser_main_win.cc

@@ -11,25 +11,10 @@
 #include "chrome/common/chrome_utility_messages.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
-#include "content/public/common/dwrite_font_platform_win.h"
 #include "grit/cef_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/win/direct_write.h"
 
-namespace {
-
-void ExecuteFontCacheBuildTask(const base::FilePath& path) {
-  base::WeakPtr<content::UtilityProcessHost> utility_process_host(
-      content::UtilityProcessHost::Create(NULL, NULL)->AsWeakPtr());
-  utility_process_host->SetName(l10n_util::GetStringUTF16(
-      IDS_UTILITY_PROCESS_FONT_CACHE_BUILDER_NAME));
-  utility_process_host->DisableSandbox();
-  utility_process_host->Send(
-      new ChromeUtilityHostMsg_BuildDirectWriteFontCache(path));
-}
-
-}  // namespace
-
 void CefBrowserMainParts::PlatformInitialize() {
   HRESULT res;
 
@@ -45,39 +30,3 @@ void CefBrowserMainParts::PlatformInitialize() {
   res = OleInitialize(NULL);
   DCHECK(SUCCEEDED(res));
 }
-
-void CefBrowserMainParts::PlatformPreMainMessageLoopRun() {
-  // From ChromeBrowserMainPartsWin::PostProfileInit().
-  // DirectWrite support is mainly available on Windows 7 and up.
-  if (gfx::win::ShouldUseDirectWrite()) {
-    const base::FilePath& cache_path = global_browser_context_->GetPath();
-    if (cache_path.empty())
-      return;
-
-    const base::FilePath& font_cache_path =
-        cache_path.AppendASCII(content::kFontCacheSharedSectionName);
-    // This function will create a read only section if cache file exists
-    // otherwise it will spawn utility process to build cache file, which will
-    // be used during next browser start/postprofileinit.
-    if (!content::LoadFontCache(font_cache_path)) {
-      // We delay building of font cache until first startup page loads.
-      // During first renderer start there are lot of things happening
-      // simultaneously some of them are:
-      // - Renderer is going through all font files on the system to create
-      //   a font collection.
-      // - Renderer loading up startup URL, accessing HTML/JS File cache,
-      //   net activity etc.
-      // - Extension initialization.
-      // We delay building of cache mainly to avoid parallel font file
-      // loading along with Renderer. Some systems have significant number of
-      // font files which takes long time to process.
-      // Related information is at http://crbug.com/436195.
-      const int kBuildFontCacheDelaySec = 30;
-      content::BrowserThread::PostDelayedTask(
-          content::BrowserThread::IO,
-          FROM_HERE,
-          base::Bind(ExecuteFontCacheBuildTask, font_cache_path),
-          base::TimeDelta::FromSeconds(kBuildFontCacheDelaySec));
-    }
-  }
-}