Clean up a few includes, introduce iwyu.

src/fonts/SkFontMgr_indirect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFontMgr_indirect.h"
 
 #include "SkDataTable.h"
 #include "SkFontStyle.h"
+#include "SkMutex.h"
 #include "SkOnce.h"
 #include "SkStream.h"
-#include "SkTSearch.h"
+#include "SkString.h"
 #include "SkTypeface.h"
+#include "SkTemplates.h"
 
 class SkData;
-class SkString;
 
 class SkStyleSet_Indirect : public SkFontStyleSet {
 public:
     /** Takes ownership of the SkRemotableFontIdentitySet. */
     SkStyleSet_Indirect(const SkFontMgr_Indirect* owner, int familyIndex,
                         SkRemotableFontIdentitySet* data)
         : fOwner(SkRef(owner)), fFamilyIndex(familyIndex), fData(data)
     { }
 
     int count() override { return fData->count(); }
@@ skipping 261 matching lines @@
         face.reset(this->matchFamilyStyle(NULL, style));
     }
 
     if (NULL == face.get()) {
         SkFontIdentity fontId = this->fProxy->matchIndexStyle(0, style);
         face.reset(this->createTypefaceFromFontId(fontId));
     }
 
     return face.detach();
 }