Disable scissor test during texture copies

cc/texture_copier.cc

Index: cc/texture_copier.cc
diff --git a/cc/texture_copier.cc b/cc/texture_copier.cc
index 5320c6587d03094c95d596deb960d7dd764ec221..ddb0f7a549df7dbcb857e0d4de246de22d897492 100644
--- a/cc/texture_copier.cc
+++ b/cc/texture_copier.cc
@@ -49,6 +49,8 @@ void AcceleratedTextureCopier::copyTexture(Parameters parameters)
 {
     TRACE_EVENT0("cc", "TextureCopier::copyTexture");
 
+    GLC(m_context, m_context->disable(GL_SCISSOR_TEST));
+
     // Note: this code does not restore the viewport, bound program, 2D texture, framebuffer, buffer or blend enable.
     GLC(m_context, m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo));
     GLC(m_context, m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, parameters.destTexture, 0));
@@ -88,6 +90,8 @@ void AcceleratedTextureCopier::copyTexture(Parameters parameters)
     GLC(m_context, m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0));
     GLC(m_context, m_context->bindFramebuffer(GL_FRAMEBUFFER, 0));
     GLC(m_context, m_context->bindTexture(GL_TEXTURE_2D, 0));
+
+    GLC(m_context, m_context->enable(GL_SCISSOR_TEST));
 }
 
 void AcceleratedTextureCopier::flush()