Move windows specific isFixedPitch to FontPlatformData

Source/core/platform/graphics/chromium/FontPlatformDataChromiumWin.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Computer, Inc.
  * Copyright (c) 2006, 2007, 2008, 2009, 2012 Google Inc. All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  * 
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 185 matching lines @@
 {
     SkSafeUnref(m_typeface);
 
     ScriptFreeCache(&m_scriptCache);
     m_scriptCache = 0;
 
     delete m_scriptFontProperties;
     m_scriptFontProperties = 0;
 }
 
+bool FontPlatformData::isFixedPitch() const
+{
+#if ENABLE(GDI_FONTS_ON_WINDOWS)
+    // TEXTMETRICS have this. Set m_treatAsFixedPitch based off that.
+    HWndDC dc(0);
+    HGDIOBJ oldFont = SelectObject(dc, hfont());
+
+    // Yes, this looks backwards, but the fixed pitch bit is actually set if the font
+    // is *not* fixed pitch. Unbelievable but true.
+    TEXTMETRIC textMetric = { 0 };
+    if (!GetTextMetrics(dc, &textMetric)) {
+        if (ensureFontLoaded(hfont())) {
+            // Retry GetTextMetrics.
+            // FIXME: Handle gracefully the error if this call also fails.
+            // See http://crbug.com/6401.
+            if (!GetTextMetrics(dc, &textMetric))
+                LOG_ERROR("Unable to get the text metrics after second attempt");
+        }
+    }
+
+    bool treatAsFixedPitch = !(textMetric.tmPitchAndFamily & TMPF_FIXED_PITCH);
+
+    SelectObject(dc, oldFont);
+
+    return treatAsFixedPitch;
+#else
+    return typeface()->isFixedPitch();
+#endif
+}
+
 FontPlatformData::RefCountedHFONT::~RefCountedHFONT()
 {
     if (m_hfont != reinterpret_cast<HFONT>(-1)) {
         DeleteObject(m_hfont);
     }
 }
 
 FontPlatformData::RefCountedHFONT* FontPlatformData::hashTableDeletedFontValue()
 {
     DEFINE_STATIC_LOCAL(RefPtr<RefCountedHFONT>, deletedValue,
@@ skipping 65 matching lines @@
 
 bool FontPlatformData::ensureFontLoaded(HFONT font)
 {
     WebKit::WebSandboxSupport* sandboxSupport = WebKit::Platform::current()->sandboxSupport();
     // if there is no sandbox, then we can assume the font
     // was able to be loaded successfully already
     return sandboxSupport ? sandboxSupport->ensureFontLoaded(font) : true;
 }
 
 }