Make texture mapping OpenGL ES 2.0 compliant.

ui/gfx/compositor/compositor_gl.cc

Index: ui/gfx/compositor/compositor_gl.cc
diff --git a/ui/gfx/compositor/compositor_gl.cc b/ui/gfx/compositor/compositor_gl.cc
index 6e1e65160f90ab50da4cf374b41042b54fd6b385..b5937ef2b6d68ef04d8b29ec3613694e5809e203 100644
--- a/ui/gfx/compositor/compositor_gl.cc
+++ b/ui/gfx/compositor/compositor_gl.cc
@@ -316,6 +316,8 @@ void TextureGL::SetCanvas(const SkCanvas& canvas,
 
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   } else if (size_ != overall_size) {  // Size has changed.
     size_ = overall_size;
     glBindTexture(GL_TEXTURE_2D, texture_id_);