cc: Unify context losing machinery

cc/gl_renderer.cc

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/gl_renderer.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 625 matching lines @@
     DCHECK_LE(tex_scale_y, 1.0f);
 
     if (shaderTexTransformLocation != -1) {
         GLC(context(), context()->uniform4f(shaderTexTransformLocation,
                                             0.0f, 0.0f,
                                             tex_scale_x, tex_scale_y));
     } else if (shaderTexScaleLocation != -1) {
         GLC(context(), context()->uniform2f(shaderTexScaleLocation,
                                             tex_scale_x, tex_scale_y));
     } else {
-      NOTREACHED();
+        DCHECK(isContextLost());
     }
 
     if (shaderMaskSamplerLocation != -1) {
         DCHECK(shaderMaskTexCoordScaleLocation != 1);
         DCHECK(shaderMaskTexCoordOffsetLocation != 1);
         GLC(context(), context()->activeTexture(GL_TEXTURE1));
         GLC(context(), context()->uniform1i(shaderMaskSamplerLocation, 1));
         GLC(context(), context()->uniform2f(shaderMaskTexCoordOffsetLocation,
                                             quad->mask_uv_rect.x(), quad->mask_uv_rect.y()));
         GLC(context(), context()->uniform2f(shaderMaskTexCoordScaleLocation,
@@ skipping 849 matching lines @@
 
 bool GLRenderer::bindFramebufferToTexture(DrawingFrame& frame, const ScopedResource* texture, const gfx::Rect& framebufferRect)
 {
     DCHECK(texture->id());
 
     GLC(m_context, m_context->bindFramebuffer(GL_FRAMEBUFFER, m_offscreenFramebufferId));
     m_currentFramebufferLock = make_scoped_ptr(new ResourceProvider::ScopedWriteLockGL(m_resourceProvider, texture->id()));
     unsigned textureId = m_currentFramebufferLock->textureId();
     GLC(m_context, m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureId, 0));
 
-    DCHECK(m_context->checkFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
+    DCHECK(m_context->checkFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE || isContextLost());
 
     initializeMatrices(frame, framebufferRect, false);
     setDrawViewportSize(framebufferRect.size());
 
     return true;
 }
 
 void GLRenderer::setScissorTestRect(const gfx::Rect& scissorRect)
 {
     ensureScissorTestEnabled();
@@ skipping 272 matching lines @@
 
     releaseRenderPassTextures();
 }
 
 bool GLRenderer::isContextLost()
 {
     return (m_context->getGraphicsResetStatusARB() != GL_NO_ERROR);
 }
 
 }  // namespace cc