Add support for URL.searchParams getter.

third_party/WebKit/Source/core/dom/DOMURL.cpp

Index: third_party/WebKit/Source/core/dom/DOMURL.cpp
diff --git a/third_party/WebKit/Source/core/dom/DOMURL.cpp b/third_party/WebKit/Source/core/dom/DOMURL.cpp
index e0679ba650f8e1e82540b1aaa50af0a9466605d9..1b1373b96f9ef4f977f6d0c17e8fd3e6b5227c86 100644
--- a/third_party/WebKit/Source/core/dom/DOMURL.cpp
+++ b/third_party/WebKit/Source/core/dom/DOMURL.cpp
@@ -30,24 +30,37 @@
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
+#include "core/dom/URLSearchParams.h"
 #include "core/fetch/MemoryCache.h"
 #include "core/fileapi/Blob.h"
 #include "core/html/PublicURLManager.h"
 #include "platform/blob/BlobURL.h"
 #include "platform/weborigin/SecurityOrigin.h"
+#include "wtf/TemporaryChange.h"
 
 namespace blink {
 
 DOMURL::DOMURL(const String& url, const KURL& base, ExceptionState& exceptionState)
 {
-    if (!base.isValid())
+    if (!base.isValid()) {
         exceptionState.throwTypeError("Invalid base URL");
+        return;
+    }
 
     m_url = KURL(base, url);
     if (!m_url.isValid())
         exceptionState.throwTypeError("Invalid URL");
 }
 
+DOMURL::~DOMURL()
+{
+}
+
+DEFINE_TRACE(DOMURL)
+{
+    visitor->trace(m_searchParams);
+}
+
 void DOMURL::setInput(const String& value)
 {
     KURL url(blankURL(), value);
@@ -58,6 +71,16 @@ void DOMURL::setInput(const String& value)
         m_url = KURL();
         m_input = value;
     }
+    update();
+}
+
+void DOMURL::setSearch(const String& value)
+{
+    DOMURLUtils::setSearch(value);
+    if (!value.isEmpty() && value[0] == '?')
+        updateSearchParams(value.substring(1));
+    else
+        updateSearchParams(value);
 }
 
 String DOMURL::createObjectURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
@@ -101,4 +124,27 @@ void DOMURL::revokeObjectUUID(ExecutionContext* executionContext, const String&
     executionContext->publicURLManager().revoke(uuid);
 }
 
+URLSearchParams* DOMURL::searchParams()
+{
+    if (!m_searchParams)
+        m_searchParams = URLSearchParams::create(url().query(), this);
+
+    return m_searchParams;
+}
+
+void DOMURL::update()
+{
+    updateSearchParams(url().query());
+}
+
+void DOMURL::updateSearchParams(const String& queryString)
+{
+    if (!m_searchParams)
+        return;
+
+    TemporaryChange<bool> scope(m_isInUpdate, true);
+    ASSERT(m_searchParams->urlObject() == this);
+    m_searchParams->setInput(queryString);
+}
+
 } // namespace blink