Fix compile warnings with attributes.

BUG=angle:676

Change-Id: I291c0b618854179f726cb4c969fb65182d3b591e
Reviewed-on: https://chromium-review.googlesource.com/204340
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>

src/libGLESv2/renderer/VertexBuffer.cpp

@@ -236,7 +236,8 @@ bool StaticVertexBufferInterface::lookupAttribute(const gl::VertexAttribute &att
             mCache[element].normalized == attrib.normalized &&
             mCache[element].pureInteger == attrib.pureInteger)
         {
-            if (mCache[element].attributeOffset == attrib.offset % ComputeVertexAttributeStride(attrib))
+            size_t offset = (static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib));
+            if (mCache[element].attributeOffset == offset)
             {
                 if (outStreamOffset)
                 {
@@ -275,7 +276,7 @@ bool StaticVertexBufferInterface::storeVertexAttributes(const gl::VertexAttribut
     unsigned int streamOffset;
     if (VertexBufferInterface::storeVertexAttributes(attrib, currentValue, start, count, instances, &streamOffset))
     {
-        int attributeOffset = attrib.offset % ComputeVertexAttributeStride(attrib);
+        size_t attributeOffset = static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib);
         VertexElement element = { attrib.type, attrib.size, ComputeVertexAttributeStride(attrib), attrib.normalized, attrib.pureInteger, attributeOffset, streamOffset };
         mCache.push_back(element);
 

src/libGLESv2/renderer/VertexBuffer.h

@@ -110,7 +110,7 @@ class StaticVertexBufferInterface : public VertexBufferInterface
     ~StaticVertexBufferInterface();
 
     bool storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData &currentValue,
-                              GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset);
+                               GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset);
 
     bool lookupAttribute(const gl::VertexAttribute &attribute, unsigned int* outStreamFffset);
 
@@ -121,11 +121,11 @@ class StaticVertexBufferInterface : public VertexBufferInterface
     struct VertexElement
     {
         GLenum type;
-        GLint size;
-        GLsizei stride;
+        GLuint size;
+        GLuint stride;
         bool normalized;
         bool pureInteger;
-        int attributeOffset;
+        size_t attributeOffset;
 
         unsigned int streamOffset;
     };