Add text autosizing override in the inspector.

Source/core/page/Settings.cpp

Index: Source/core/page/Settings.cpp
diff --git a/Source/core/page/Settings.cpp b/Source/core/page/Settings.cpp
index d46062dcaef1fa115bf41d9943a69d49d21d0910..a1984f73740fa0277457b1c40318153a6aa4f07d 100644
--- a/Source/core/page/Settings.cpp
+++ b/Source/core/page/Settings.cpp
@@ -123,6 +123,7 @@ Settings::Settings(Page* page)
 #endif
     , m_useWideViewport(true)
     , m_loadWithOverviewMode(true)
+    , m_textAutosizingOverride(NoOverride)
     SETTINGS_INITIALIZER_LIST
     , m_isJavaEnabled(false)
     , m_loadsImagesAutomatically(false)
@@ -227,6 +228,21 @@ void Settings::setTextAutosizingEnabled(bool textAutosizingEnabled)
     m_page->setNeedsRecalcStyleInAllFrames();
 }
 
+bool Settings::textAutosizingEnabled() const
+{
+    switch (m_textAutosizingOverride) {
+    case NoOverride:
+        return m_textAutosizingEnabled;
+    case TextAutosizingOverrideEnabled:
+        return true;
+    case TextAutosizingOverrideDisabled:
+        return false;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return false;
+}
+
 void Settings::setTextAutosizingWindowSizeOverride(const IntSize& textAutosizingWindowSizeOverride)
 {
     if (m_textAutosizingWindowSizeOverride == textAutosizingWindowSizeOverride)
@@ -236,6 +252,15 @@ void Settings::setTextAutosizingWindowSizeOverride(const IntSize& textAutosizing
     m_page->setNeedsRecalcStyleInAllFrames();
 }
 
+void Settings::setTextAutosizingEnabledOverride(TextAutosizingOverride textAutosizingOverride)
+{
+    if (m_textAutosizingOverride == textAutosizingOverride)
+        return;
+
+    m_textAutosizingOverride = textAutosizingOverride;
+    m_page->setNeedsRecalcStyleInAllFrames();
+}
+
 void Settings::setUseWideViewport(bool useWideViewport)
 {
     if (m_useWideViewport == useWideViewport)