Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/webdatabase/Database.cpp

Index: Source/modules/webdatabase/Database.cpp
diff --git a/Source/modules/webdatabase/Database.cpp b/Source/modules/webdatabase/Database.cpp
index b6676d6bc5da5d5f0adf3bbdd6cb9c026fa85f42..e0a9edc1e82ee5354b652c52f50f4ee9574eb101 100644
--- a/Source/modules/webdatabase/Database.cpp
+++ b/Source/modules/webdatabase/Database.cpp
@@ -102,7 +102,7 @@ private:
         : m_context(context)
     {
     }
-    
+
     RefPtr<ScriptExecutionContext> m_context;
 };
 
@@ -113,7 +113,7 @@ Database::~Database()
         // Grab a pointer to the script execution here because we're releasing it when we pass it to
         // DerefContextTask::create.
         ScriptExecutionContext* scriptExecutionContext = m_scriptExecutionContext.get();
-        
+
         scriptExecutionContext->postTask(DerefContextTask::create(m_scriptExecutionContext.release()));
     }
 }