Start writing blink platform GN file.

This adds a target for blink_common, and starts a rough skeleton of blink_platform. There are a lot of dependencies for the platform pat (like V8) so I thought it best to checkpoint that before I start worrying about those.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/257733002

git-svn-id: svn://svn.chromium.org/blink/trunk@172998 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/platform/BUILD.gn

+# Copyright 2014 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.
+
+component("blink_common") {
+  sources = [
+    "exported/WebCString.cpp",
+    "exported/WebString.cpp",
+    "exported/WebCommon.cpp",
+  ]
+
+  defines = [
+    "BLINK_COMMON_IMPLEMENTATION=1",
+    "INSIDE_BLINK",
+  ]
+
+  configs += [
+    "//build/config/compiler:wexit_time_destructors"
+    "//third_party/WebKit/Source:config",
+  ]
+
+  deps = [
+    "//third_party/WebKit/Source/wtf",
+  ]
+}
+
+# Chromium's version of WebCore includes the following Objective-C classes. The
+# system-provided WebCore framework may also provide these classes. Because of
+# the nature of Objective-C binding (dynamically at runtime), it's possible for
+# the Chromium-provided versions to interfere with the system-provided
+# versions. This may happen when a system framework attempts to use
+# core.framework, such as when converting an HTML-flavored string to an
+# NSAttributedString. The solution is to force Objective-C class names that
+# would conflict to use alternate names.
+#
+# This list will hopefully shrink but may also grow. Its performance is
+# monitored by the "Check Objective-C Rename" postbuild step, and any
+# suspicious-looking symbols not handled here or whitelisted in that step will
+# cause a build failure.
+#
+# If this is unhandled, the console will receive log messages
+# such as:
+# com.google.Chrome[] objc[]: Class ScrollbarPrefsObserver is implemented in both .../Google Chrome.app/Contents/Versions/.../Google Chrome Helper.app/Contents/MacOS/../../../Google Chrome Framework.framework/Google Chrome Framework and /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/Versions/A/WebCore. One of the two will be used. Which one is undefined.
+if (is_mac) {
+  config("mac_objc_renaming") {
+    defines = [
+      "WebCascadeList=ChromiumWebCoreObjCWebCascadeList",
+      "WebFontCache=ChromiumWebCoreObjCWebFontCache",
+      "WebScrollAnimationHelperDelegate=ChromiumWebCoreObjCWebScrollAnimationHelperDelegate",
+      "WebScrollbarPainterControllerDelegate=ChromiumWebCoreObjCWebScrollbarPainterControllerDelegate",
+      "WebScrollbarPainterDelegate=ChromiumWebCoreObjCWebScrollbarPainterDelegate",
+      "WebScrollbarPartAnimation=ChromiumWebCoreObjCWebScrollbarPartAnimation",
+      "WebCoreFlippedView=ChromiumWebCoreObjCWebCoreFlippedView",
+      "WebCoreTextFieldCell=ChromiumWebCoreObjCWebCoreTextFieldCell",
+      "WebCoreRenderThemeNotificationObserver=ChromiumWebCoreObjCWebCoreRenderThemeNotificationObserver",
+    ]
+  }
+}
+
+# TODO(brettw) Work in progress, finish this when more dependencies are
+# complete.
+#
+# TODO(brettw) Objective C Renaming postbuild steps on Mac.
+component("blink_platform") {
+  sources = [
+    # TODO(brettw) reference these from .gypi.
+  ]
+
+  configs += [
+    "//third_party/WebKit/Source:config",
+  ]
+
+  defines = [
+    "BLINK_PLATFORM_IMPLEMENTATION=1",
+    "INSIDE_BLINK",
+  ]
+
+  include_dirs = [
+    #"$angle_path/include",
+    "$root_gen_dir/blink",
+  ]
+
+  deps = [
+    ":blink_common",
+    "//third_party/WebKit/Source/wtf",
+    #'blink_heap_asm_stubs',
+    #'<(DEPTH)/gpu/gpu.gyp:gles2_c_lib',
+    #'<(DEPTH)/skia/skia.gyp:skia',
+    #'<(DEPTH)/third_party/icu/icu.gyp:icui18n',
+    #'<(DEPTH)/third_party/icu/icu.gyp:icuuc',
+    #'<(DEPTH)/third_party/libpng/libpng.gyp:libpng',
+    #'<(DEPTH)/third_party/libwebp/libwebp.gyp:libwebp',
+    #'<(DEPTH)/third_party/ots/ots.gyp:ots',
+    #'<(DEPTH)/third_party/qcms/qcms.gyp:qcms',
+    #'<(DEPTH)/url/url.gyp:url_lib',
+    #'<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
+    #'platform_generated.gyp:make_platform_generated',
+    #'<(DEPTH)/third_party/iccjpeg/iccjpeg.gyp:iccjpeg',
+    #'<(libjpeg_gyp_path):libjpeg',
+  ]
+
+  if (is_mac) {
+    # Some Mac-specific parts of WebKit won't compile without having this
+    # prefix header injected.
+    cflags = [
+      "-include",
+      rebase_path("../core/WebCorePrefixMac.h", root_build_dir),
+    ]
+
+    configs += [ ":mac_objc_renaming" ]
+  } else if (is_win) {
+    cflags = [
+      "/wd4267",  # Conversion from 'size_t' to 'type', possible loss of data.
+      "/wd4334",  # Result of 32-bit shift implicitly converted to 64 bits.
+      "/wd4724",  # Modulo by 0.
+    ]
+  }
+}

third_party/WebKit/Source/wtf/BUILD.gn

@@ -47,10 +47,21 @@ component("wtf") {
     "..:features",
   ]
 
+  # TODO(brettw) bug 366814: This should just pull dependent configs from "icu",
+  # but that currently doesn't work for groups. Instead, manually expand the
+  # "icu" group's dependents here until a GN build is pushed with the fix.
+  #deps = [
+  #  "//third_party/icu",
+  #]
+  #forward_dependent_configs_from = [ "//third_party/icu" ]
   deps = [
-    "//third_party/icu",
+    "//third_party/icu:icui18n",
+    "//third_party/icu:icuuc",
+  ]
+  forward_dependent_configs_from = [
+    "//third_party/icu:icui18n",
+    "//third_party/icu:icuuc",
   ]
-  forward_dependent_configs_from = [ "//third_party/icu" ]
 
   if (is_win) {
     sources -= [