Add static buffer support

src/gpu/vk/GrVkGpu.cpp

Index: src/gpu/vk/GrVkGpu.cpp
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index e5d24fc5806ff8044a55da6416b311f9c9bcb8f3..ca1bb10636e91d4c552c7d93ab697f543bccc067 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -425,9 +425,9 @@ bool GrVkGpu::uploadTexDataLinear(GrVkTexture* tex,
 }
 
 bool GrVkGpu::uploadTexDataOptimal(GrVkTexture* tex,
-                                    int left, int top, int width, int height,
-                                    GrPixelConfig dataConfig,
-                                    const SkTArray<GrMipLevel>& texels) {
+                                   int left, int top, int width, int height,
+                                   GrPixelConfig dataConfig,
+                                   const SkTArray<GrMipLevel>& texels) {
     SkASSERT(!tex->isLinearTiled());
     // The assumption is either that we have no mipmaps, or that our rect is the entire texture
     SkASSERT(1 == texels.count() ||
@@ -661,6 +661,20 @@ GrTexture* GrVkGpu::onCreateTexture(const GrSurfaceDesc& desc, SkBudgeted budget
 
 ////////////////////////////////////////////////////////////////////////////////
 
+bool GrVkGpu::updateBuffer(GrVkBuffer* buffer, const void* src, size_t srcSizeInBytes) {
+
+    // Update the buffer
+    fCurrentCmdBuffer->updateBuffer(this, buffer, 0, srcSizeInBytes, src);
+
+    // Submit the current command buffer to the Queue
+    // TODO: batch these?
+    this->submitCommandBuffer(kSkip_SyncQueue);

[egdaniel, 2016/06/30 13:51:19]

why then need to submit the command buffer here?

[jvanverth1, 2016/06/30 14:56:38]

Done.

+
+    return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 static GrSurfaceOrigin resolve_origin(GrSurfaceOrigin origin) {
     // By default, all textures in Vk use TopLeft
     if (kDefault_GrSurfaceOrigin == origin) {