Add an API to report debugName in GraphicsLayer

Source/WebKit/chromium/src/PinchViewports.cpp

Index: Source/WebKit/chromium/src/PinchViewports.cpp
diff --git a/Source/WebKit/chromium/src/PinchViewports.cpp b/Source/WebKit/chromium/src/PinchViewports.cpp
index 935080480b5594657915ec99d4991de796f8a00a..37bb1aa5b4142b088dd1aab5bd7dc7ae32bf435b 100644
--- a/Source/WebKit/chromium/src/PinchViewports.cpp
+++ b/Source/WebKit/chromium/src/PinchViewports.cpp
@@ -64,14 +64,6 @@ PinchViewports::PinchViewports(WebViewImpl* owner)
 
     m_innerViewportScrollLayer->platformLayer()->setScrollable(true);
 
-#ifndef NDEBUG
-    m_innerViewportClipLayer->setName("inner viewport clip layer");
-    m_pageScaleLayer->setName("page scale layer");
-    m_innerViewportScrollLayer->setName("inner viewport scroll layer");
-    m_overlayScrollbarHorizontal->setName("overlay scrollbar horizontal");
-    m_overlayScrollbarVertical->setName("overlay scrollbar vertical");
-#endif
-
     m_innerViewportClipLayer->addChild(m_pageScaleLayer.get());
     m_pageScaleLayer->addChild(m_innerViewportScrollLayer.get());
     m_innerViewportClipLayer->addChild(m_overlayScrollbarHorizontal.get());
@@ -183,4 +175,22 @@ void PinchViewports::paintContents(const GraphicsLayer*, WebCore::GraphicsContex
 {
 }
 
+String PinchViewports::debugName(const GraphicsLayer* graphicsLayer)
+{
+    String name;
+    if (graphicsLayer == m_innerViewportClipLayer.get()) {
+        name = "Inner Viewport Clip Layer";
+    } else if (graphicsLayer == m_pageScaleLayer.get()) {
+        name =  "Page Scale Layer";
+    } else if (graphicsLayer == m_innerViewportScrollLayer.get()) {
+        name =  "Inner Viewport Scroll Layer";
+    } else if (graphicsLayer == m_overlayScrollbarHorizontal.get()) {
+        name =  "Overlay Scrollbar Horizontal Layer";
+    } else if (graphicsLayer == m_overlayScrollbarVertical.get()) {
+        name =  "Overlay Scrollbar Vertical Layer";
+    }
+
+    return name;
+}
+
 } // namespace WebKit