Avoid duplicate functions/code in core/inspector.

third_party/WebKit/Source/core/inspector/InspectorPageAgent.h

Index: third_party/WebKit/Source/core/inspector/InspectorPageAgent.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.h b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.h
index 2a4098c1390cc634e1a8c0e387eb2e1510783723..e4f1dc502ba32dfb1d402884b8c823cbef6fe449 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.h
@@ -200,12 +200,6 @@ class CORE_EXPORT InspectorPageAgent final
       bool is_regex,
       std::unique_ptr<SearchInResourceCallback>);
 
-  static bool DataContent(const char* data,
-                          unsigned size,
-                          const String& text_encoding_name,
-                          bool with_base64_encode,
-                          String* result);
-
   void PageLayoutInvalidated(bool resized);
 
   std::unique_ptr<protocol::Page::Frame> BuildObjectForFrame(LocalFrame*);