Changing serviceuri param to be url from string in Blink and tagging requests to speech recognizer

Source/modules/speech/SpeechRecognition.cpp

Index: Source/modules/speech/SpeechRecognition.cpp
diff --git a/Source/modules/speech/SpeechRecognition.cpp b/Source/modules/speech/SpeechRecognition.cpp
index 9309fe571c22f61a05c5ec9b5e46297064540470..dcba8f5099eb0b3a95221e76ca7caee7f4277b2b 100644
--- a/Source/modules/speech/SpeechRecognition.cpp
+++ b/Source/modules/speech/SpeechRecognition.cpp
@@ -35,6 +35,7 @@
 #include "modules/speech/SpeechRecognitionController.h"
 #include "modules/speech/SpeechRecognitionError.h"
 #include "modules/speech/SpeechRecognitionEvent.h"
+#include "platform/weborigin/KURL.h"
 
 namespace blink {
 
@@ -58,8 +59,18 @@ void SpeechRecognition::start(ExceptionState& exceptionState)
         return;
     }
 
+    // Prepend chromium to the client param to tag requests coming from the browser.
+    std::size_t pos;
+    KURL serviceURI;
+    KURL kurl(ParsedURLString, m_serviceURI);
+    String query = kurl.query();
+    if (kurl.isValid() && !query.isEmpty() && ((pos = query.find("client=")) != std::string::npos)) {
+        query.replace(pos, 7, "client=chromium/");
+        serviceURI = kurl;
+    }
+
     m_finalResults.clear();
-    m_controller->start(this, m_grammars, m_lang, m_serviceURI, m_continuous, m_interimResults, m_maxAlternatives, m_audioTrack);
+    m_controller->start(this, m_grammars, m_lang, serviceURI, m_continuous, m_interimResults, m_maxAlternatives, m_audioTrack);
     m_started = true;
 }