Add PERSISTENT_MAP usage for GpuMemoryBuffers.

content/common/gpu/gpu_memory_buffer_factory.cc

Index: content/common/gpu/gpu_memory_buffer_factory.cc
diff --git a/content/common/gpu/gpu_memory_buffer_factory.cc b/content/common/gpu/gpu_memory_buffer_factory.cc
index 019bdd8dbcc629c80ad7ae24fe43d15526feaf77..7794ea64985e31fb3cd454e82276881d73f2f153 100644
--- a/content/common/gpu/gpu_memory_buffer_factory.cc
+++ b/content/common/gpu/gpu_memory_buffer_factory.cc
@@ -23,20 +23,37 @@ namespace content {
 
 // static
 void GpuMemoryBufferFactory::GetSupportedTypes(
+    gfx::GpuMemoryBuffer::Usage usage,
     std::vector<gfx::GpuMemoryBufferType>* types) {
-  const gfx::GpuMemoryBufferType supported_types[] = {
+  switch (usage) {
+    case gfx::GpuMemoryBuffer::PERSISTENT_MAP: {
+      // TODO(reveman): PERSISTENT_MAP is only supported by shared memory
+      // buffers. crbug.com/489438
+      const gfx::GpuMemoryBufferType supported_types[] = {
+          gfx::SHARED_MEMORY_BUFFER};
+      types->assign(supported_types,
+                    supported_types + arraysize(supported_types));
+      break;
+    }
+    case gfx::GpuMemoryBuffer::MAP:
+    case gfx::GpuMemoryBuffer::SCANOUT: {
+      const gfx::GpuMemoryBufferType supported_types[] = {
 #if defined(OS_MACOSX)
-    gfx::IO_SURFACE_BUFFER,
+        gfx::IO_SURFACE_BUFFER,
 #endif
 #if defined(OS_ANDROID)
-    gfx::SURFACE_TEXTURE_BUFFER,
+        gfx::SURFACE_TEXTURE_BUFFER,
 #endif
 #if defined(USE_OZONE)
-    gfx::OZONE_NATIVE_BUFFER,
+        gfx::OZONE_NATIVE_BUFFER,
 #endif
-    gfx::SHARED_MEMORY_BUFFER
-  };
-  types->assign(supported_types, supported_types + arraysize(supported_types));
+        gfx::SHARED_MEMORY_BUFFER
+      };
+      types->assign(supported_types,
+                    supported_types + arraysize(supported_types));
+      break;
+    }
+  }
 }
 
 // static