Patch 5: Implemented android message filter and platform.

chrome/browser/spellchecker/spellcheck_message_filter_platform.h

Index: chrome/browser/spellchecker/spellcheck_message_filter_platform.h
diff --git a/chrome/browser/spellchecker/spellcheck_message_filter_platform.h b/chrome/browser/spellchecker/spellcheck_message_filter_platform.h
index a632112734b42457585b725c12f53d7b976d3a3a..f927f8496de19aeb85f42cee01a8c162d6c9a530 100644
--- a/chrome/browser/spellchecker/spellcheck_message_filter_platform.h
+++ b/chrome/browser/spellchecker/spellcheck_message_filter_platform.h
@@ -10,6 +10,10 @@
 #include "chrome/browser/spellchecker/spellcheck_message_filter.h"
 #include "chrome/common/spellcheck_result.h"
 #include "content/public/browser/browser_message_filter.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_array.h"
+#include "base/android/jni_string.h"
+
 
 // A message filter implementation that receives
 // the platform-specific spell checker requests from SpellCheckProvider.
@@ -57,4 +61,40 @@ class SpellCheckMessageFilterPlatform : public content::BrowserMessageFilter {
   DISALLOW_COPY_AND_ASSIGN(SpellCheckMessageFilterPlatform);
 };
 
+class SpellingRequest {
+ public:
+  SpellingRequest(content::BrowserMessageFilter* destination,
+                  int render_process_id);
+
+  void RequestCheck(const base::string16& text,
+                    int route_id,
+                    int identifier);
+
+  void GetSpellcheckInfo(JNIEnv* env, jobject jobj, jobjectArray suggestionsArray,
+                         jintArray offsetArray, jintArray lengthArray);
+ private:
+
+  // Request a check for |text_| from local spell checker.
+  void RequestLocalCheck();
+
+  // Check if all pending requests are done, send reply to render process if so.
+  void OnCheckCompleted();
+
+  bool RegisterSpellingRequest(JNIEnv* env);
+
+  std::vector<SpellCheckResult> local_results_;
+
+  base::android::ScopedJavaGlobalRef<jobject> java_object_;
+
+  // Barrier closure for completion of both remote and local check.
+  base::Closure completion_barrier_;
+
+  content::BrowserMessageFilter* destination_;  // ref-counted.
+  int render_process_id_;
+
+  base::string16 text_;
+  int route_id_;
+  int identifier_;
+};
+
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_MESSAGE_FILTER_PLATFORM_H_