Prepare for color input datalist support on Android

public/web/WebViewClient.h

Index: public/web/WebViewClient.h
diff --git a/public/web/WebViewClient.h b/public/web/WebViewClient.h
index 740e8205d36c89041edf077ce28497cba2d0c9e8..41cf968d89da50fde416db5207ed977c47e21c65 100644
--- a/public/web/WebViewClient.h
+++ b/public/web/WebViewClient.h
@@ -50,6 +50,7 @@ namespace blink {
 class WebAXObject;
 class WebColorChooser;
 class WebColorChooserClient;
+class WebColorSuggestion;
 class WebCompositorOutputSurface;
 class WebDateTimeChooserCompletion;
 class WebDragData;
@@ -184,10 +185,18 @@ public:
     // This method opens the color chooser and returns a new WebColorChooser
     // instance. If there is a WebColorChooser already from the last time this
     // was called, it ends the color chooser by calling endChooser, and replaces
-    // it with the new one.
+    // it with the new one. The given list of suggestions can be used to show a
+    // simple interface with a limited set of choices.
+
+    // FIXME: Should be removed when the chromium side change lands.
     virtual WebColorChooser* createColorChooser(WebColorChooserClient*,
                                                 const WebColor&) { return 0; }
 
+    virtual WebColorChooser* createColorChooser(
+        WebColorChooserClient*,
+        const WebColor&,
+        const WebVector<WebColorSuggestion>&) { return 0; }
+
     // This method returns immediately after showing the dialog. When the
     // dialog is closed, it should call the WebFileChooserCompletion to
     // pass the results of the dialog. Returns false if