Sets a transparent background for out-of-process subframes.

third_party/WebKit/Source/web/WebViewImpl.h

Index: third_party/WebKit/Source/web/WebViewImpl.h
diff --git a/third_party/WebKit/Source/web/WebViewImpl.h b/third_party/WebKit/Source/web/WebViewImpl.h
index 9858b0af43f68a4a574ad408f100b7ed12a97359..adab552e373778b42e54881fde347754a6ac81c7 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.h
+++ b/third_party/WebKit/Source/web/WebViewImpl.h
@@ -168,9 +168,6 @@ public:
     WebSettings* settings() override;
     WebString pageEncoding() const override;
     void setPageEncoding(const WebString&) override;
-    bool isTransparent() const override;
-    void setIsTransparent(bool value) override;
-    void setBaseBackgroundColor(WebColor) override;
     bool tabsToLinks() const override;
     void setTabsToLinks(bool value) override;
     bool tabKeyCyclesThroughElements() const override;
@@ -294,6 +291,7 @@ public:
     void invalidateRect(const IntRect&);
 
     void setIgnoreInputEvents(bool newValue);
+    void setBaseBackgroundColor(WebColor);
     void setBackgroundColorOverride(WebColor);
     void setZoomFactorOverride(float);
     void updateShowFPSCounter();
@@ -537,6 +535,9 @@ public:
     // Use in Slimming Paint v2 to update the layer tree for the content.
     PaintArtifactCompositor& paintArtifactCompositor() { return m_paintArtifactCompositor; }
 
+    bool isTransparent() const;
+    void setIsTransparent(bool value);
+
 private:
     InspectorOverlay* inspectorOverlay();