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 c8dfebd785015286a412da3cc3a6dd3a8050dbef..bca22e4290d766e83a14b7e2b32c55f630ee0e8c 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;
@@ -293,6 +290,7 @@ 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();