Fix the warnings when build content/ with clang

content/renderer/android/content_detector.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
 #define CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_
 
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebRange.h"
 
 namespace WebKit {
 class WebHitTestResult;
 }
 
 namespace content {
 
 // Base class for text-based content detectors.
 class ContentDetector {
  public:
   // Holds the content detection results.
   struct Result {
-    Result() : valid(false) {}
+    Result();
     Result(const WebKit::WebRange& content_boundaries,
            const std::string& text,
-           const GURL& intent_url)
-        : valid(true),
-          content_boundaries(content_boundaries),
-          text(text),
-          intent_url(intent_url) {}
+           const GURL& intent_url);
+    ~Result();
 
     bool valid;
     WebKit::WebRange content_boundaries;
     std::string text; // Processed text of the content.
     GURL intent_url; // URL of the intent that should process this content.
   };
 
   virtual ~ContentDetector() {}
 
   // Returns a WebKit range delimiting the contents found around the tapped
@@ skipping 22 matching lines @@
 
   WebKit::WebRange FindContentRange(const WebKit::WebHitTestResult& hit_test,
                                     std::string* content_text);
 
   DISALLOW_COPY_AND_ASSIGN(ContentDetector);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_ANDROID_CONTENT_DETECTOR_H_