Implement WebKit::WebUnitTestSupport::createLayerTreeViewForTesting()

This provides an implementation WebKit::WebUnitTestSupport::createLayerTreeViewForTesting()
for webkit_unit_tests that want to instantiate compositing support and need initialization
to succeed but do not need to actually render anything. Critically, this sort of
view does not depend on any particular client or settings.

This appears to be a lot of code, but it's actually a bit of movement and very
little new code.  The primary movement is extracting most of the test class
cc/test/fake_web_graphics_context3d.h into cc/fake_web_graphics_context3d.h so
that it can be exported to other modules as a regular class. This is necessary
since webkit_unit_tests are in a different component and must use only the
normally exported parts of the cc library.  cc/test/test_web_graphics_context3d.h
has all of the extra bells and whistles and assertions for cc_unittests.

WebLayerTreeViewImplForTesting uses a very simple context and does not depend
on an external client at all.  This results in two subtle but very significant
properties (which are the point of this whole exercise) - the unit tests no longer
depend on WebLayerTreeViewClient or WebGraphicsContext3D at all.  The entire
notion of what the context type is now entirely hidden in the chromium side of
the codebase and can be swapped out for something else (like gpu::GLES2Interface)
without any further changes on the WebKit side.

After this patch, the only remaining caller of WebCompositorSupport::createLayerTreeView
in the WebKit tree is WebViewHost, which needs to instantiate a view that can
render pixels (using mesa) for DumpRenderTree.  I'll address that separately.

BUG=175383

Review URL: https://codereview.chromium.org/12211110

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181817 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 151 insertions, 0 deletions

diff --git a/cc/test/test_web_graphics_context_3d.h b/cc/test/test_web_graphics_context_3d.h
new file mode 100644
index 0000000..abfd9c9
--- /dev/null
+++ b/cc/test/test_web_graphics_context_3d.h
@@ -0,0 +1,151 @@
+// Copyright 2011 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.
+
+#ifndef CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
+#define CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
+
+#include <vector>
+
+#include "base/compiler_specific.h"
+#include "base/hash_tables.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/stl_util.h"
+#include "cc/fake_web_graphics_context_3d.h"
+#include "third_party/khronos/GLES2/gl2.h"
+
+namespace cc {
+
+class TestWebGraphicsContext3D : public FakeWebGraphicsContext3D {
+ public:
+  static scoped_ptr<TestWebGraphicsContext3D> Create() {
+    return make_scoped_ptr(new TestWebGraphicsContext3D());
+  }
+  static scoped_ptr<TestWebGraphicsContext3D> Create(
+      const WebKit::WebGraphicsContext3D::Attributes& attributes) {
+    return make_scoped_ptr(new TestWebGraphicsContext3D(attributes));
+  }
+  virtual ~TestWebGraphicsContext3D();
+
+  virtual bool makeContextCurrent();
+
+  virtual int width();
+  virtual int height();
+
+  virtual void reshape(int width, int height);
+
+  virtual bool isContextLost();
+  virtual WebKit::WGC3Denum getGraphicsResetStatusARB();
+
+  virtual void attachShader(WebKit::WebGLId program, WebKit::WebGLId shader);
+  virtual void bindBuffer(WebKit::WGC3Denum target, WebKit::WebGLId buffer);
+  virtual void bindFramebuffer(
+      WebKit::WGC3Denum target, WebKit::WebGLId framebuffer);
+  virtual void bindRenderbuffer(
+      WebKit::WGC3Denum target, WebKit::WebGLId renderbuffer);
+  virtual void bindTexture(
+      WebKit::WGC3Denum target,
+      WebKit::WebGLId texture_id);
+
+  virtual WebKit::WGC3Denum checkFramebufferStatus(WebKit::WGC3Denum target);
+
+  virtual Attributes getContextAttributes();
+
+  virtual WebKit::WebString getString(WebKit::WGC3Denum name);
+  virtual WebKit::WGC3Dint getUniformLocation(
+      WebKit::WebGLId program,
+      const WebKit::WGC3Dchar* name);
+  virtual WebKit::WGC3Dsizeiptr getVertexAttribOffset(
+      WebKit::WGC3Duint index,
+      WebKit::WGC3Denum pname);
+
+  virtual WebKit::WGC3Dboolean isBuffer(WebKit::WebGLId buffer);
+  virtual WebKit::WGC3Dboolean isEnabled(WebKit::WGC3Denum cap);
+  virtual WebKit::WGC3Dboolean isFramebuffer(WebKit::WebGLId framebuffer);
+  virtual WebKit::WGC3Dboolean isProgram(WebKit::WebGLId program);
+  virtual WebKit::WGC3Dboolean isRenderbuffer(WebKit::WebGLId renderbuffer);
+  virtual WebKit::WGC3Dboolean isShader(WebKit::WebGLId shader);
+  virtual WebKit::WGC3Dboolean isTexture(WebKit::WebGLId texture);
+
+  virtual void useProgram(WebKit::WebGLId program);
+
+  virtual WebKit::WebGLId createBuffer();
+  virtual WebKit::WebGLId createFramebuffer();
+  virtual WebKit::WebGLId createProgram();
+  virtual WebKit::WebGLId createRenderbuffer();
+  virtual WebKit::WebGLId createShader(WebKit::WGC3Denum);
+  virtual WebKit::WebGLId createTexture();
+
+  virtual void deleteBuffer(WebKit::WebGLId id);
+  virtual void deleteFramebuffer(WebKit::WebGLId id);
+  virtual void deleteProgram(WebKit::WebGLId id);
+  virtual void deleteRenderbuffer(WebKit::WebGLId id);
+  virtual void deleteShader(WebKit::WebGLId id);
+  virtual void deleteTexture(WebKit::WebGLId texture_id);
+
+  virtual void endQueryEXT(WebKit::WGC3Denum target);
+  virtual void getQueryObjectuivEXT(
+      WebKit::WebGLId query,
+      WebKit::WGC3Denum pname,
+      WebKit::WGC3Duint* params);
+
+  virtual void setContextLostCallback(
+      WebGraphicsContextLostCallback* callback);
+
+  virtual void loseContextCHROMIUM(WebKit::WGC3Denum current,
+                                   WebKit::WGC3Denum other);
+
+  // When set, MakeCurrent() will fail after this many times.
+  void set_times_make_current_succeeds(int times) {
+    times_make_current_succeeds_ = times;
+  }
+  void set_times_bind_texture_succeeds(int times) {
+    times_bind_texture_succeeds_ = times;
+  }
+  void set_times_end_query_succeeds(int times) {
+    times_end_query_succeeds_ = times;
+  }
+
+  size_t NumTextures() const { return textures_.size(); }
+  WebKit::WebGLId TextureAt(int i) const { return textures_[i]; }
+
+  size_t NumUsedTextures() const { return used_textures_.size(); }
+  bool UsedTexture(int texture) const {
+    return ContainsKey(used_textures_, texture);
+  }
+  void ResetUsedTextures() { used_textures_.clear(); }
+
+  void set_have_extension_io_surface(bool have) {
+    have_extension_io_surface_ = have;
+  }
+  void set_have_extension_egl_image(bool have) {
+    have_extension_egl_image_ = have;
+  }
+
+  static const WebKit::WebGLId kExternalTextureId;
+  virtual WebKit::WebGLId NextTextureId();
+
+ protected:
+  TestWebGraphicsContext3D();
+  TestWebGraphicsContext3D(
+      const WebKit::WebGraphicsContext3D::Attributes& attributes);
+
+  unsigned context_id_;
+  unsigned next_texture_id_;
+  Attributes attributes_;
+  bool have_extension_io_surface_;
+  bool have_extension_egl_image_;
+  int times_make_current_succeeds_;
+  int times_bind_texture_succeeds_;
+  int times_end_query_succeeds_;
+  bool context_lost_;
+  WebGraphicsContextLostCallback* context_lost_callback_;
+  std::vector<WebKit::WebGLId> textures_;
+  base::hash_set<WebKit::WebGLId> used_textures_;
+  int width_;
+  int height_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_