Remove SharedBuffer::unlock() and keep Resource's SharedBuffer always locked

third_party/WebKit/Source/platform/SharedBuffer.cpp

Index: third_party/WebKit/Source/platform/SharedBuffer.cpp
diff --git a/third_party/WebKit/Source/platform/SharedBuffer.cpp b/third_party/WebKit/Source/platform/SharedBuffer.cpp
index 6ce6466b54320d0db0037e446ea4c78f831d7dcc..48d73cd612f2ab7f0075d6072ca433ad7a10c2ef 100644
--- a/third_party/WebKit/Source/platform/SharedBuffer.cpp
+++ b/third_party/WebKit/Source/platform/SharedBuffer.cpp
@@ -123,7 +123,6 @@ void SharedBuffer::append(PassRefPtr<SharedBuffer> data)
 
 void SharedBuffer::appendInternal(const char* data, size_t length)
 {
-    ASSERT(isLocked());
     if (!length)
         return;
 
@@ -210,7 +209,6 @@ void SharedBuffer::mergeSegmentsIntoBuffer() const
 
 size_t SharedBuffer::getSomeDataInternal(const char*& someData, size_t position) const
 {
-    ASSERT(isLocked());
     size_t totalSize = size();
     if (position >= totalSize) {
         someData = 0;
@@ -283,22 +281,6 @@ sk_sp<SkData> SharedBuffer::getAsSkData() const
     return data;
 }
 
-bool SharedBuffer::lock()
-{
-    return m_buffer.lock();
-}
-
-void SharedBuffer::unlock()
-{
-    mergeSegmentsIntoBuffer();
-    m_buffer.unlock();
-}
-
-bool SharedBuffer::isLocked() const
-{
-    return m_buffer.isLocked();
-}
-
 void SharedBuffer::onMemoryDump(const String& dumpPrefix, WebProcessMemoryDump* memoryDump) const
 {
     if (m_buffer.size()) {