Move font_warmup_win, fix webrtc dep.

content/common/font_warmup_win.h

-// Copyright 2014 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.
-
-#ifndef CONTENT_COMMON_FONT_WARMUP_WIN_H_
-#define CONTENT_COMMON_FONT_WARMUP_WIN_H_
-
-#include <stddef.h>
-
-#include "base/files/file_path.h"
-#include "base/macros.h"
-#include "content/common/content_export.h"
-
-class SkFontMgr;
-class SkTypeface;
-
-namespace content {
-
-// Make necessary calls to cache the data for a given font, used before
-// sandbox lockdown.
-CONTENT_EXPORT void DoPreSandboxWarmupForTypeface(SkTypeface* typeface);
-
-// Get the shared font manager used during pre-sandbox warmup for DirectWrite
-// fonts.
-CONTENT_EXPORT SkFontMgr* GetPreSandboxWarmupFontMgr();
-
-class GdiFontPatchData {
- public:
-  virtual ~GdiFontPatchData() {}
-
- protected:
-  GdiFontPatchData() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(GdiFontPatchData);
-};
-
-// Hook a module's imported GDI font functions to reimplement font enumeration
-// and font data retrieval for DLLs which can't be easily modified.
-CONTENT_EXPORT GdiFontPatchData* PatchGdiFontEnumeration(
-    const base::FilePath& path);
-
-// Testing method to get the number of in-flight emulated GDI handles.
-CONTENT_EXPORT size_t GetEmulatedGdiHandleCountForTesting();
-
-// Testing method to reset the table of emulated GDI handles.
-CONTENT_EXPORT void ResetEmulatedGdiHandlesForTesting();
-
-// Sets the pre-sandbox warmup font manager directly. This should only be used
-// for testing the implementation.
-CONTENT_EXPORT void SetPreSandboxWarmupFontMgrForTesting(SkFontMgr* fontmgr);
-
-// Warmup the direct write font manager for content processes.
-CONTENT_EXPORT void WarmupDirectWrite();
-
-// Directwrite connects to the font cache service to retrieve information about
-// fonts installed on the system etc. This works well outside the sandbox and
-// within the sandbox as long as the lpc connection maintained by the current
-// process with the font cache service remains valid. It appears that there
-// are cases when this connection is dropped after which directwrite is unable
-// to connect to the font cache service which causes problems with characters
-// disappearing.
-// Directwrite has fallback code to enumerate fonts if it is unable to connect
-// to the font cache service. We need to intercept the following APIs to
-// ensure that it does not connect to the font cache service.
-// NtALpcConnectPort
-// OpenSCManagerW
-// OpenServiceW
-// StartServiceW
-// CloseServiceHandle.
-// These are all IAT patched.
-CONTENT_EXPORT void PatchServiceManagerCalls();
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_FONT_WARMUP_WIN_H_