Re-land: ui: Add custom stride support to GLImageMemory.

ui/gl/gl_image_memory.h

Index: ui/gl/gl_image_memory.h
diff --git a/ui/gl/gl_image_memory.h b/ui/gl/gl_image_memory.h
index 3ce0440146d2ac53f26880ffa8244686063b0db1..5492ec391a2f95753f6d1cee6c2f14c2ecfcfe19 100644
--- a/ui/gl/gl_image_memory.h
+++ b/ui/gl/gl_image_memory.h
@@ -16,7 +16,9 @@ class GL_EXPORT GLImageMemory : public GLImage {
  public:
   GLImageMemory(const gfx::Size& size, unsigned internalformat);
 
-  bool Initialize(const unsigned char* memory, gfx::BufferFormat format);
+  bool Initialize(const unsigned char* memory,
+                  gfx::BufferFormat format,
+                  size_t stride);
 
   // Overridden from GLImage:
   void Destroy(bool have_context) override;
@@ -40,12 +42,14 @@ class GL_EXPORT GLImageMemory : public GLImage {
   ~GLImageMemory() override;
 
   gfx::BufferFormat format() const { return format_; }
+  size_t stride() const { return stride_; }
 
  private:
   const gfx::Size size_;
   const unsigned internalformat_;
   const unsigned char* memory_;
   gfx::BufferFormat format_;
+  size_t stride_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageMemory);
 };