Add text autosizing override in the inspector.

Source/core/inspector/InspectorPageAgent.h

Index: Source/core/inspector/InspectorPageAgent.h
diff --git a/Source/core/inspector/InspectorPageAgent.h b/Source/core/inspector/InspectorPageAgent.h
index 49679d662ac5ad2525ea98554c05c447ef9b0561..b5af18abdafbe18123c5c0bdc9c0c3733b2e7eb1 100644
--- a/Source/core/inspector/InspectorPageAgent.h
+++ b/Source/core/inspector/InspectorPageAgent.h
@@ -101,7 +101,7 @@ public:
     virtual void searchInResource(ErrorString*, const String& frameId, const String& url, const String& query, const bool* optionalCaseSensitive, const bool* optionalIsRegex, RefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchMatch> >&);
     virtual void searchInResources(ErrorString*, const String&, const bool* caseSensitive, const bool* isRegex, RefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchResult> >&);
     virtual void setDocumentContent(ErrorString*, const String& frameId, const String& html);
-    virtual void setDeviceMetricsOverride(ErrorString*, int width, int height, double deviceScaleFactor, bool fitWindow);
+    virtual void setDeviceMetricsOverride(ErrorString*, int width, int height, double deviceScaleFactor, bool fitWindow, const bool* optionalTextAutosizing);
     virtual void setShowPaintRects(ErrorString*, bool show);
     virtual void setShowDebugBorders(ErrorString*, bool show);
     virtual void setShowFPSCounter(ErrorString*, bool show);
@@ -122,12 +122,15 @@ public:
     virtual void handleJavaScriptDialog(ErrorString*, bool accept, const String* promptText);
     virtual void setShowViewportSizeOnResize(ErrorString*, bool show, const bool* showGrid);
 
-    // Geolocation override helpers.
+    // Geolocation override helper.
     GeolocationPosition* overrideGeolocationPosition(GeolocationPosition*);
 
-    // DeviceOrientation helper
+    // DeviceOrientation helper.
     DeviceOrientationData* overrideDeviceOrientation(DeviceOrientationData*);
 
+    // Text autosizing helper.
+    bool overrideTextAutosizing(bool);
+
     // InspectorInstrumentation API
     void didClearWindowObjectInWorld(Frame*, DOMWrapperWorld*);
     void domContentLoadedEventFired(Frame*);
@@ -180,8 +183,8 @@ private:
     static void resourceContent(ErrorString*, Frame*, const KURL&, String* result, bool* base64Encoded);
 
     InspectorPageAgent(InstrumentingAgents*, Page*, InspectorCompositeState*, InjectedScriptManager*, InspectorClient*, InspectorOverlay*);
-    bool deviceMetricsChanged(int width, int height, double fontScaleFactor, bool fitWindow);
-    void updateViewMetrics(int, int, double, bool);
+    bool deviceMetricsChanged(int width, int height, double fontScaleFactor, bool fitWindow, bool textAutosizing);
+    void updateViewMetrics(int width, int height, double deviceScaleFactor, bool fitWindow, bool textAutosizing);
     void updateTouchEventEmulationInPage(bool);
     void updateOverridesTopOffset();