Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/platform/PlatformSpeechSynthesisUtterance.cpp

Index: Source/core/platform/PlatformSpeechSynthesisUtterance.cpp
diff --git a/Source/core/platform/PlatformSpeechSynthesisUtterance.cpp b/Source/core/platform/PlatformSpeechSynthesisUtterance.cpp
index a3f3276c3136a6698090c6c9d74720078b0e0507..a137c588614f8f5bbc8115eec7faa2cfa682d714 100644
--- a/Source/core/platform/PlatformSpeechSynthesisUtterance.cpp
+++ b/Source/core/platform/PlatformSpeechSynthesisUtterance.cpp
@@ -32,7 +32,7 @@ PassRefPtr<PlatformSpeechSynthesisUtterance> PlatformSpeechSynthesisUtterance::c
 {
     return adoptRef(new PlatformSpeechSynthesisUtterance(client));
 }
-    
+
 PlatformSpeechSynthesisUtterance::PlatformSpeechSynthesisUtterance(PlatformSpeechSynthesisUtteranceClient* client)
     : m_client(client)
     , m_volume(1.0f)
@@ -40,5 +40,5 @@ PlatformSpeechSynthesisUtterance::PlatformSpeechSynthesisUtterance(PlatformSpeec
     , m_pitch(1.0f)
 {
 }
-    
+
 } // namespace WebCore