| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "components/page_load_metrics/browser/metrics_web_contents_observer.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 #include <ostream> | |
| 9 #include <string> | |
| 10 #include <utility> | |
| 11 | |
| 12 #include "base/location.h" | |
| 13 #include "base/logging.h" | |
| 14 #include "base/memory/ptr_util.h" | |
| 15 #include "base/metrics/histogram.h" | |
| 16 #include "base/metrics/user_metrics.h" | |
| 17 #include "components/page_load_metrics/browser/page_load_metrics_util.h" | |
| 18 #include "components/page_load_metrics/common/page_load_metrics_messages.h" | |
| 19 #include "components/page_load_metrics/common/page_load_timing.h" | |
| 20 #include "content/public/browser/browser_thread.h" | |
| 21 #include "content/public/browser/navigation_details.h" | |
| 22 #include "content/public/browser/navigation_handle.h" | |
| 23 #include "content/public/browser/render_frame_host.h" | |
| 24 #include "content/public/browser/render_view_host.h" | |
| 25 #include "content/public/browser/web_contents.h" | |
| 26 #include "content/public/browser/web_contents_observer.h" | |
| 27 #include "content/public/browser/web_contents_user_data.h" | |
| 28 #include "ipc/ipc_message.h" | |
| 29 #include "ipc/ipc_message_macros.h" | |
| 30 #include "ui/base/page_transition_types.h" | |
| 31 | |
| 32 DEFINE_WEB_CONTENTS_USER_DATA_KEY( | |
| 33 page_load_metrics::MetricsWebContentsObserver); | |
| 34 | |
| 35 namespace page_load_metrics { | |
| 36 | |
| 37 namespace internal { | |
| 38 | |
| 39 const char kErrorEvents[] = "PageLoad.Events.InternalError"; | |
| 40 const char kAbortChainSizeReload[] = | |
| 41 "PageLoad.Internal.ProvisionalAbortChainSize.Reload"; | |
| 42 const char kAbortChainSizeForwardBack[] = | |
| 43 "PageLoad.Internal.ProvisionalAbortChainSize.ForwardBack"; | |
| 44 const char kAbortChainSizeNewNavigation[] = | |
| 45 "PageLoad.Internal.ProvisionalAbortChainSize.NewNavigation"; | |
| 46 const char kAbortChainSizeSameURL[] = | |
| 47 "PageLoad.Internal.ProvisionalAbortChainSize.SameURL"; | |
| 48 const char kAbortChainSizeNoCommit[] = | |
| 49 "PageLoad.Internal.ProvisionalAbortChainSize.NoCommit"; | |
| 50 const char kClientRedirectFirstPaintToNavigation[] = | |
| 51 "PageLoad.Internal.ClientRedirect.FirstPaintToNavigation"; | |
| 52 const char kClientRedirectWithoutPaint[] = | |
| 53 "PageLoad.Internal.ClientRedirect.NavigationWithoutPaint"; | |
| 54 const char kCommitToCompleteNoTimingIPCs[] = | |
| 55 "PageLoad.Internal.CommitToComplete.NoTimingIPCs"; | |
| 56 | |
| 57 } // namespace internal | |
| 58 | |
| 59 namespace { | |
| 60 | |
| 61 // Helper to allow use of Optional<> values in LOG() messages. | |
| 62 std::ostream& operator<<(std::ostream& os, | |
| 63 const base::Optional<base::TimeDelta>& opt) { | |
| 64 if (opt) | |
| 65 os << opt.value(); | |
| 66 else | |
| 67 os << "(unset)"; | |
| 68 return os; | |
| 69 } | |
| 70 | |
| 71 // If second is non-zero, first must also be non-zero and less than or equal to | |
| 72 // second. | |
| 73 bool EventsInOrder(const base::Optional<base::TimeDelta>& first, | |
| 74 const base::Optional<base::TimeDelta>& second) { | |
| 75 if (!second) { | |
| 76 return true; | |
| 77 } | |
| 78 return first && first <= second; | |
| 79 } | |
| 80 | |
| 81 bool IsValidPageLoadTiming(const PageLoadTiming& timing) { | |
| 82 if (timing.IsEmpty()) | |
| 83 return false; | |
| 84 | |
| 85 // If we have a non-empty timing, it should always have a navigation start. | |
| 86 if (timing.navigation_start.is_null()) { | |
| 87 NOTREACHED() << "Received null navigation_start."; | |
| 88 return false; | |
| 89 } | |
| 90 | |
| 91 // Verify proper ordering between the various timings. | |
| 92 | |
| 93 if (!EventsInOrder(timing.response_start, timing.dom_loading)) { | |
| 94 // We sometimes get a zero response_start with a non-zero DOM loading. See | |
| 95 // crbug.com/590212. | |
| 96 DLOG(ERROR) << "Invalid response_start " << timing.response_start | |
| 97 << " for dom_loading " << timing.dom_loading; | |
| 98 return false; | |
| 99 } | |
| 100 | |
| 101 if (!EventsInOrder(timing.response_start, timing.parse_start)) { | |
| 102 // We sometimes get a zero response_start with a non-zero parse start. See | |
| 103 // crbug.com/590212. | |
| 104 DLOG(ERROR) << "Invalid response_start " << timing.response_start | |
| 105 << " for parse_start " << timing.parse_start; | |
| 106 return false; | |
| 107 } | |
| 108 | |
| 109 if (!EventsInOrder(timing.parse_start, timing.parse_stop)) { | |
| 110 NOTREACHED() << "Invalid parse_start " << timing.parse_start | |
| 111 << " for parse_stop " << timing.parse_stop; | |
| 112 return false; | |
| 113 } | |
| 114 | |
| 115 if (timing.parse_stop) { | |
| 116 const base::TimeDelta parse_duration = | |
| 117 timing.parse_stop.value() - timing.parse_start.value(); | |
| 118 if (timing.parse_blocked_on_script_load_duration > parse_duration) { | |
| 119 NOTREACHED() << "Invalid parse_blocked_on_script_load_duration " | |
| 120 << timing.parse_blocked_on_script_load_duration | |
| 121 << " for parse duration " << parse_duration; | |
| 122 return false; | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 if (timing.parse_blocked_on_script_load_from_document_write_duration > | |
| 127 timing.parse_blocked_on_script_load_duration) { | |
| 128 NOTREACHED() | |
| 129 << "Invalid parse_blocked_on_script_load_from_document_write_duration " | |
| 130 << timing.parse_blocked_on_script_load_from_document_write_duration | |
| 131 << " for parse_blocked_on_script_load_duration " | |
| 132 << timing.parse_blocked_on_script_load_duration; | |
| 133 return false; | |
| 134 } | |
| 135 | |
| 136 if (!EventsInOrder(timing.dom_loading, | |
| 137 timing.dom_content_loaded_event_start)) { | |
| 138 NOTREACHED() << "Invalid dom_loading " << timing.dom_loading | |
| 139 << " for dom_content_loaded_event_start " | |
| 140 << timing.dom_content_loaded_event_start; | |
| 141 return false; | |
| 142 } | |
| 143 | |
| 144 if (!EventsInOrder(timing.dom_content_loaded_event_start, | |
| 145 timing.load_event_start)) { | |
| 146 NOTREACHED() << "Invalid dom_content_loaded_event_start " | |
| 147 << timing.dom_content_loaded_event_start | |
| 148 << " for load_event_start " << timing.load_event_start; | |
| 149 return false; | |
| 150 } | |
| 151 | |
| 152 if (!EventsInOrder(timing.dom_loading, timing.first_layout)) { | |
| 153 NOTREACHED() << "Invalid dom_loading " << timing.dom_loading | |
| 154 << " for first_layout " << timing.first_layout; | |
| 155 return false; | |
| 156 } | |
| 157 | |
| 158 if (!EventsInOrder(timing.first_layout, timing.first_paint)) { | |
| 159 NOTREACHED() << "Invalid first_layout " << timing.first_layout | |
| 160 << " for first_paint " << timing.first_paint; | |
| 161 return false; | |
| 162 } | |
| 163 | |
| 164 if (!EventsInOrder(timing.first_paint, timing.first_text_paint)) { | |
| 165 NOTREACHED() << "Invalid first_paint " << timing.first_paint | |
| 166 << " for first_text_paint " << timing.first_text_paint; | |
| 167 return false; | |
| 168 } | |
| 169 | |
| 170 if (!EventsInOrder(timing.first_paint, timing.first_image_paint)) { | |
| 171 NOTREACHED() << "Invalid first_paint " << timing.first_paint | |
| 172 << " for first_image_paint " << timing.first_image_paint; | |
| 173 return false; | |
| 174 } | |
| 175 | |
| 176 if (!EventsInOrder(timing.first_paint, timing.first_contentful_paint)) { | |
| 177 NOTREACHED() << "Invalid first_paint " << timing.first_paint | |
| 178 << " for first_contentful_paint " | |
| 179 << timing.first_contentful_paint; | |
| 180 return false; | |
| 181 } | |
| 182 | |
| 183 return true; | |
| 184 } | |
| 185 | |
| 186 void RecordInternalError(InternalErrorLoadEvent event) { | |
| 187 UMA_HISTOGRAM_ENUMERATION(internal::kErrorEvents, event, ERR_LAST_ENTRY); | |
| 188 } | |
| 189 | |
| 190 UserAbortType AbortTypeForPageTransition(ui::PageTransition transition) { | |
| 191 if (ui::PageTransitionCoreTypeIs(transition, ui::PAGE_TRANSITION_RELOAD)) | |
| 192 return ABORT_RELOAD; | |
| 193 if (transition & ui::PAGE_TRANSITION_FORWARD_BACK) | |
| 194 return ABORT_FORWARD_BACK; | |
| 195 if (ui::PageTransitionIsNewNavigation(transition)) | |
| 196 return ABORT_NEW_NAVIGATION; | |
| 197 NOTREACHED() | |
| 198 << "AbortTypeForPageTransition received unexpected ui::PageTransition: " | |
| 199 << transition; | |
| 200 return ABORT_OTHER; | |
| 201 } | |
| 202 | |
| 203 void LogAbortChainSameURLHistogram(int aborted_chain_size_same_url) { | |
| 204 if (aborted_chain_size_same_url > 0) { | |
| 205 UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeSameURL, | |
| 206 aborted_chain_size_same_url); | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 void DispatchObserverTimingCallbacks(PageLoadMetricsObserver* observer, | |
| 211 const PageLoadTiming& last_timing, | |
| 212 const PageLoadTiming& new_timing, | |
| 213 const PageLoadMetadata& last_metadata, | |
| 214 const PageLoadExtraInfo& extra_info) { | |
| 215 if (last_timing != new_timing) | |
| 216 observer->OnTimingUpdate(new_timing, extra_info); | |
| 217 if (new_timing.dom_content_loaded_event_start && | |
| 218 !last_timing.dom_content_loaded_event_start) | |
| 219 observer->OnDomContentLoadedEventStart(new_timing, extra_info); | |
| 220 if (new_timing.load_event_start && !last_timing.load_event_start) | |
| 221 observer->OnLoadEventStart(new_timing, extra_info); | |
| 222 if (new_timing.first_layout && !last_timing.first_layout) | |
| 223 observer->OnFirstLayout(new_timing, extra_info); | |
| 224 if (new_timing.first_paint && !last_timing.first_paint) | |
| 225 observer->OnFirstPaint(new_timing, extra_info); | |
| 226 if (new_timing.first_text_paint && !last_timing.first_text_paint) | |
| 227 observer->OnFirstTextPaint(new_timing, extra_info); | |
| 228 if (new_timing.first_image_paint && !last_timing.first_image_paint) | |
| 229 observer->OnFirstImagePaint(new_timing, extra_info); | |
| 230 if (new_timing.first_contentful_paint && !last_timing.first_contentful_paint) | |
| 231 observer->OnFirstContentfulPaint(new_timing, extra_info); | |
| 232 if (new_timing.parse_start && !last_timing.parse_start) | |
| 233 observer->OnParseStart(new_timing, extra_info); | |
| 234 if (new_timing.parse_stop && !last_timing.parse_stop) | |
| 235 observer->OnParseStop(new_timing, extra_info); | |
| 236 if (extra_info.metadata.behavior_flags != last_metadata.behavior_flags) | |
| 237 observer->OnLoadingBehaviorObserved(extra_info); | |
| 238 } | |
| 239 | |
| 240 } // namespace | |
| 241 | |
| 242 PageLoadTracker::PageLoadTracker( | |
| 243 bool in_foreground, | |
| 244 PageLoadMetricsEmbedderInterface* embedder_interface, | |
| 245 const GURL& currently_committed_url, | |
| 246 content::NavigationHandle* navigation_handle, | |
| 247 int aborted_chain_size, | |
| 248 int aborted_chain_size_same_url) | |
| 249 : did_stop_tracking_(false), | |
| 250 navigation_start_(navigation_handle->NavigationStart()), | |
| 251 url_(navigation_handle->GetURL()), | |
| 252 abort_type_(ABORT_NONE), | |
| 253 started_in_foreground_(in_foreground), | |
| 254 aborted_chain_size_(aborted_chain_size), | |
| 255 aborted_chain_size_same_url_(aborted_chain_size_same_url), | |
| 256 embedder_interface_(embedder_interface) { | |
| 257 DCHECK(!navigation_handle->HasCommitted()); | |
| 258 embedder_interface_->RegisterObservers(this); | |
| 259 for (const auto& observer : observers_) { | |
| 260 observer->OnStart(navigation_handle, currently_committed_url, | |
| 261 started_in_foreground_); | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 PageLoadTracker::~PageLoadTracker() { | |
| 266 if (did_stop_tracking_) | |
| 267 return; | |
| 268 | |
| 269 const PageLoadExtraInfo info = ComputePageLoadExtraInfo(); | |
| 270 DCHECK_NE(static_cast<bool>(info.time_to_commit), | |
| 271 static_cast<bool>(failed_provisional_load_info_)); | |
| 272 if (info.time_to_commit && timing_.IsEmpty()) { | |
| 273 RecordInternalError(ERR_NO_IPCS_RECEIVED); | |
| 274 const base::TimeTicks commit_time = | |
| 275 navigation_start_ + info.time_to_commit.value(); | |
| 276 PAGE_LOAD_HISTOGRAM(internal::kCommitToCompleteNoTimingIPCs, | |
| 277 base::TimeTicks::Now() - commit_time); | |
| 278 } | |
| 279 // Recall that trackers that are given ABORT_UNKNOWN_NAVIGATION have their | |
| 280 // chain length added to the next navigation. Take care not to double count | |
| 281 // them. Also do not double count committed loads, which call this already. | |
| 282 if (commit_time_.is_null() && abort_type_ != ABORT_UNKNOWN_NAVIGATION) | |
| 283 LogAbortChainHistograms(nullptr); | |
| 284 | |
| 285 for (const auto& observer : observers_) { | |
| 286 if (failed_provisional_load_info_) { | |
| 287 observer->OnFailedProvisionalLoad(*failed_provisional_load_info_, info); | |
| 288 } else { | |
| 289 observer->OnComplete(timing_, info); | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 void PageLoadTracker::LogAbortChainHistograms( | |
| 295 content::NavigationHandle* final_navigation) { | |
| 296 if (aborted_chain_size_ == 0) | |
| 297 return; | |
| 298 // Note that this could be broken out by this navigation's abort type, if more | |
| 299 // granularity is needed. Add one to the chain size to count the current | |
| 300 // navigation. In the other cases, the current navigation is the final | |
| 301 // navigation (which commits). | |
| 302 if (!final_navigation) { | |
| 303 UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeNoCommit, | |
| 304 aborted_chain_size_ + 1); | |
| 305 LogAbortChainSameURLHistogram(aborted_chain_size_same_url_ + 1); | |
| 306 return; | |
| 307 } | |
| 308 | |
| 309 // The following is only executed for committing trackers. | |
| 310 DCHECK(!commit_time_.is_null()); | |
| 311 | |
| 312 // Note that histograms could be separated out by this commit's transition | |
| 313 // type, but for simplicity they will all be bucketed together. | |
| 314 LogAbortChainSameURLHistogram(aborted_chain_size_same_url_); | |
| 315 | |
| 316 ui::PageTransition committed_transition = | |
| 317 final_navigation->GetPageTransition(); | |
| 318 switch (AbortTypeForPageTransition(committed_transition)) { | |
| 319 case ABORT_RELOAD: | |
| 320 UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeReload, | |
| 321 aborted_chain_size_); | |
| 322 return; | |
| 323 case ABORT_FORWARD_BACK: | |
| 324 UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeForwardBack, | |
| 325 aborted_chain_size_); | |
| 326 return; | |
| 327 case ABORT_NEW_NAVIGATION: | |
| 328 UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeNewNavigation, | |
| 329 aborted_chain_size_); | |
| 330 return; | |
| 331 default: | |
| 332 NOTREACHED() | |
| 333 << "LogAbortChainHistograms received unexpected ui::PageTransition: " | |
| 334 << committed_transition; | |
| 335 return; | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 void PageLoadTracker::WebContentsHidden() { | |
| 340 // Only log the first time we background in a given page load. | |
| 341 if (background_time_.is_null()) { | |
| 342 // Make sure we either started in the foreground and haven't been | |
| 343 // foregrounded yet, or started in the background and have already been | |
| 344 // foregrounded. | |
| 345 DCHECK_EQ(started_in_foreground_, foreground_time_.is_null()); | |
| 346 background_time_ = base::TimeTicks::Now(); | |
| 347 ClampBrowserTimestampIfInterProcessTimeTickSkew(&background_time_); | |
| 348 } | |
| 349 | |
| 350 for (const auto& observer : observers_) | |
| 351 observer->OnHidden(); | |
| 352 } | |
| 353 | |
| 354 void PageLoadTracker::WebContentsShown() { | |
| 355 // Only log the first time we foreground in a given page load. | |
| 356 if (foreground_time_.is_null()) { | |
| 357 // Make sure we either started in the background and haven't been | |
| 358 // backgrounded yet, or started in the foreground and have already been | |
| 359 // backgrounded. | |
| 360 DCHECK_NE(started_in_foreground_, background_time_.is_null()); | |
| 361 foreground_time_ = base::TimeTicks::Now(); | |
| 362 ClampBrowserTimestampIfInterProcessTimeTickSkew(&foreground_time_); | |
| 363 } | |
| 364 | |
| 365 for (const auto& observer : observers_) | |
| 366 observer->OnShown(); | |
| 367 } | |
| 368 | |
| 369 void PageLoadTracker::Commit(content::NavigationHandle* navigation_handle) { | |
| 370 // TODO(bmcquade): To improve accuracy, consider adding commit time to | |
| 371 // NavigationHandle. Taking a timestamp here should be close enough for now. | |
| 372 commit_time_ = base::TimeTicks::Now(); | |
| 373 ClampBrowserTimestampIfInterProcessTimeTickSkew(&commit_time_); | |
| 374 url_ = navigation_handle->GetURL(); | |
| 375 for (const auto& observer : observers_) { | |
| 376 observer->OnCommit(navigation_handle); | |
| 377 } | |
| 378 LogAbortChainHistograms(navigation_handle); | |
| 379 } | |
| 380 | |
| 381 void PageLoadTracker::FailedProvisionalLoad( | |
| 382 content::NavigationHandle* navigation_handle) { | |
| 383 DCHECK(!failed_provisional_load_info_); | |
| 384 failed_provisional_load_info_.reset(new FailedProvisionalLoadInfo( | |
| 385 base::TimeTicks::Now() - navigation_handle->NavigationStart(), | |
| 386 navigation_handle->GetNetErrorCode())); | |
| 387 } | |
| 388 | |
| 389 void PageLoadTracker::Redirect(content::NavigationHandle* navigation_handle) { | |
| 390 for (const auto& observer : observers_) { | |
| 391 observer->OnRedirect(navigation_handle); | |
| 392 } | |
| 393 } | |
| 394 | |
| 395 void PageLoadTracker::OnInputEvent(const blink::WebInputEvent& event) { | |
| 396 for (const auto& observer : observers_) { | |
| 397 observer->OnUserInput(event); | |
| 398 } | |
| 399 } | |
| 400 | |
| 401 void PageLoadTracker::NotifyClientRedirectTo( | |
| 402 const PageLoadTracker& destination) { | |
| 403 if (timing_.first_paint) { | |
| 404 base::TimeTicks first_paint_time = | |
| 405 navigation_start() + timing_.first_paint.value(); | |
| 406 base::TimeDelta first_paint_to_navigation; | |
| 407 if (destination.navigation_start() > first_paint_time) | |
| 408 first_paint_to_navigation = | |
| 409 destination.navigation_start() - first_paint_time; | |
| 410 PAGE_LOAD_HISTOGRAM(internal::kClientRedirectFirstPaintToNavigation, | |
| 411 first_paint_to_navigation); | |
| 412 } else { | |
| 413 UMA_HISTOGRAM_BOOLEAN(internal::kClientRedirectWithoutPaint, true); | |
| 414 } | |
| 415 } | |
| 416 | |
| 417 bool PageLoadTracker::UpdateTiming(const PageLoadTiming& new_timing, | |
| 418 const PageLoadMetadata& new_metadata) { | |
| 419 // Throw away IPCs that are not relevant to the current navigation. | |
| 420 // Two timing structures cannot refer to the same navigation if they indicate | |
| 421 // that a navigation started at different times, so a new timing struct with a | |
| 422 // different start time from an earlier struct is considered invalid. | |
| 423 bool valid_timing_descendent = | |
| 424 timing_.navigation_start.is_null() || | |
| 425 timing_.navigation_start == new_timing.navigation_start; | |
| 426 // Ensure flags sent previously are still present in the new metadata fields. | |
| 427 bool valid_behavior_descendent = | |
| 428 (metadata_.behavior_flags & new_metadata.behavior_flags) == | |
| 429 metadata_.behavior_flags; | |
| 430 if (IsValidPageLoadTiming(new_timing) && valid_timing_descendent && | |
| 431 valid_behavior_descendent) { | |
| 432 // There are some subtle ordering constraints here. GetPageLoadMetricsInfo() | |
| 433 // must be called before DispatchObserverTimingCallbacks, but its | |
| 434 // implementation depends on the state of metadata_, so we need to update | |
| 435 // metadata_ before calling GetPageLoadMetricsInfo. Thus, we make a copy of | |
| 436 // timing here, update timing_ and metadata_, and then proceed to dispatch | |
| 437 // the observer timing callbacks. | |
| 438 const PageLoadTiming last_timing = timing_; | |
| 439 timing_ = new_timing; | |
| 440 | |
| 441 const PageLoadMetadata last_metadata = metadata_; | |
| 442 metadata_ = new_metadata; | |
| 443 const PageLoadExtraInfo info = ComputePageLoadExtraInfo(); | |
| 444 for (const auto& observer : observers_) { | |
| 445 DispatchObserverTimingCallbacks(observer.get(), last_timing, new_timing, | |
| 446 last_metadata, info); | |
| 447 } | |
| 448 return true; | |
| 449 } | |
| 450 return false; | |
| 451 } | |
| 452 | |
| 453 void PageLoadTracker::StopTracking() { | |
| 454 did_stop_tracking_ = true; | |
| 455 } | |
| 456 | |
| 457 void PageLoadTracker::AddObserver( | |
| 458 std::unique_ptr<PageLoadMetricsObserver> observer) { | |
| 459 observers_.push_back(std::move(observer)); | |
| 460 } | |
| 461 | |
| 462 void PageLoadTracker::ClampBrowserTimestampIfInterProcessTimeTickSkew( | |
| 463 base::TimeTicks* event_time) { | |
| 464 DCHECK(event_time != nullptr); | |
| 465 // Windows 10 GCE bot non-deterministically failed because TimeTicks::Now() | |
| 466 // called in the browser process e.g. commit_time was less than | |
| 467 // navigation_start_ that was populated in the renderer process because the | |
| 468 // clock was not system-wide monotonic. | |
| 469 // Note that navigation_start_ can also be set in the browser process in | |
| 470 // some cases and in those cases event_time should never be < | |
| 471 // navigation_start_. If it is due to a code error and it gets clamped in this | |
| 472 // function, on high resolution systems it should lead to a dcheck failure. | |
| 473 | |
| 474 // TODO(shivanisha): Currently IsHighResolution is the best way to check | |
| 475 // if the clock is system-wide monotonic. However IsHighResolution | |
| 476 // does a broader check to see if the clock in use is high resolution | |
| 477 // which also implies it is system-wide monotonic (on Windows). | |
| 478 if (base::TimeTicks::IsHighResolution()) { | |
| 479 DCHECK(event_time->is_null() || *event_time >= navigation_start_); | |
| 480 return; | |
| 481 } | |
| 482 | |
| 483 if (!event_time->is_null() && *event_time < navigation_start_) { | |
| 484 RecordInternalError(ERR_INTER_PROCESS_TIME_TICK_SKEW); | |
| 485 *event_time = navigation_start_; | |
| 486 } | |
| 487 } | |
| 488 | |
| 489 PageLoadExtraInfo PageLoadTracker::ComputePageLoadExtraInfo() { | |
| 490 base::Optional<base::TimeDelta> first_background_time; | |
| 491 base::Optional<base::TimeDelta> first_foreground_time; | |
| 492 base::Optional<base::TimeDelta> time_to_abort; | |
| 493 base::Optional<base::TimeDelta> time_to_commit; | |
| 494 | |
| 495 if (!background_time_.is_null()) { | |
| 496 DCHECK_GE(background_time_, navigation_start_); | |
| 497 first_background_time = background_time_ - navigation_start_; | |
| 498 } | |
| 499 | |
| 500 if (!foreground_time_.is_null()) { | |
| 501 DCHECK_GE(foreground_time_, navigation_start_); | |
| 502 first_foreground_time = foreground_time_ - navigation_start_; | |
| 503 } | |
| 504 | |
| 505 if (abort_type_ != ABORT_NONE) { | |
| 506 DCHECK_GE(abort_time_, navigation_start_); | |
| 507 time_to_abort = abort_time_ - navigation_start_; | |
| 508 } else { | |
| 509 DCHECK(abort_time_.is_null()); | |
| 510 } | |
| 511 | |
| 512 if (!commit_time_.is_null()) { | |
| 513 DCHECK_GE(commit_time_, navigation_start_); | |
| 514 time_to_commit = commit_time_ - navigation_start_; | |
| 515 } | |
| 516 | |
| 517 return PageLoadExtraInfo( | |
| 518 first_background_time, first_foreground_time, started_in_foreground_, | |
| 519 commit_time_.is_null() ? GURL() : url_, time_to_commit, abort_type_, | |
| 520 time_to_abort, metadata_); | |
| 521 } | |
| 522 | |
| 523 void PageLoadTracker::NotifyAbort(UserAbortType abort_type, | |
| 524 base::TimeTicks timestamp, | |
| 525 bool is_certainly_browser_timestamp) { | |
| 526 DCHECK_NE(abort_type, ABORT_NONE); | |
| 527 // Use UpdateAbort to update an already notified PageLoadTracker. | |
| 528 if (abort_type_ != ABORT_NONE) | |
| 529 return; | |
| 530 | |
| 531 UpdateAbortInternal(abort_type, timestamp, is_certainly_browser_timestamp); | |
| 532 } | |
| 533 | |
| 534 void PageLoadTracker::UpdateAbort(UserAbortType abort_type, | |
| 535 base::TimeTicks timestamp, | |
| 536 bool is_certainly_browser_timestamp) { | |
| 537 DCHECK_NE(abort_type, ABORT_NONE); | |
| 538 DCHECK_NE(abort_type, ABORT_OTHER); | |
| 539 DCHECK_EQ(abort_type_, ABORT_OTHER); | |
| 540 | |
| 541 // For some aborts (e.g. navigations), the initiated timestamp can be earlier | |
| 542 // than the timestamp that aborted the load. Taking the minimum gives the | |
| 543 // closest user initiated time known. | |
| 544 UpdateAbortInternal(abort_type, std::min(abort_time_, timestamp), | |
| 545 is_certainly_browser_timestamp); | |
| 546 } | |
| 547 | |
| 548 bool PageLoadTracker::IsLikelyProvisionalAbort( | |
| 549 base::TimeTicks abort_cause_time) { | |
| 550 // Note that |abort_cause_time - abort_time| can be negative. | |
| 551 return abort_type_ == ABORT_OTHER && | |
| 552 (abort_cause_time - abort_time_).InMilliseconds() < 100; | |
| 553 } | |
| 554 | |
| 555 bool PageLoadTracker::MatchesOriginalNavigation( | |
| 556 content::NavigationHandle* navigation_handle) { | |
| 557 // Neither navigation should have committed. | |
| 558 DCHECK(!navigation_handle->HasCommitted()); | |
| 559 DCHECK(commit_time_.is_null()); | |
| 560 return navigation_handle->GetURL() == url_; | |
| 561 } | |
| 562 | |
| 563 void PageLoadTracker::UpdateAbortInternal(UserAbortType abort_type, | |
| 564 base::TimeTicks timestamp, | |
| 565 bool is_certainly_browser_timestamp) { | |
| 566 // When a provisional navigation commits, that navigation's start time is | |
| 567 // interpreted as the abort time for other provisional loads in the tab. | |
| 568 // However, this only makes sense if the committed load started after the | |
| 569 // aborted provisional loads started. Thus we ignore cases where the committed | |
| 570 // load started before the aborted provisional load, as this would result in | |
| 571 // recording a negative time-to-abort. The real issue here is that we have to | |
| 572 // infer the cause of aborts. It would be better if the navigation code could | |
| 573 // instead report the actual cause of an aborted navigation. See crbug/571647 | |
| 574 // for details. | |
| 575 if (timestamp < navigation_start_) { | |
| 576 RecordInternalError(ERR_ABORT_BEFORE_NAVIGATION_START); | |
| 577 abort_type_ = ABORT_NONE; | |
| 578 abort_time_ = base::TimeTicks(); | |
| 579 return; | |
| 580 } | |
| 581 abort_type_ = abort_type; | |
| 582 abort_time_ = timestamp; | |
| 583 | |
| 584 if (is_certainly_browser_timestamp) { | |
| 585 ClampBrowserTimestampIfInterProcessTimeTickSkew(&abort_time_); | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 // static | |
| 590 MetricsWebContentsObserver::MetricsWebContentsObserver( | |
| 591 content::WebContents* web_contents, | |
| 592 std::unique_ptr<PageLoadMetricsEmbedderInterface> embedder_interface) | |
| 593 : content::WebContentsObserver(web_contents), | |
| 594 in_foreground_(false), | |
| 595 embedder_interface_(std::move(embedder_interface)), | |
| 596 has_navigated_(false) { | |
| 597 RegisterInputEventObserver(web_contents->GetRenderViewHost()); | |
| 598 } | |
| 599 | |
| 600 MetricsWebContentsObserver* MetricsWebContentsObserver::CreateForWebContents( | |
| 601 content::WebContents* web_contents, | |
| 602 std::unique_ptr<PageLoadMetricsEmbedderInterface> embedder_interface) { | |
| 603 DCHECK(web_contents); | |
| 604 | |
| 605 MetricsWebContentsObserver* metrics = FromWebContents(web_contents); | |
| 606 if (!metrics) { | |
| 607 metrics = new MetricsWebContentsObserver(web_contents, | |
| 608 std::move(embedder_interface)); | |
| 609 web_contents->SetUserData(UserDataKey(), metrics); | |
| 610 } | |
| 611 return metrics; | |
| 612 } | |
| 613 | |
| 614 MetricsWebContentsObserver::~MetricsWebContentsObserver() { | |
| 615 NotifyAbortAllLoads(ABORT_CLOSE); | |
| 616 } | |
| 617 | |
| 618 void MetricsWebContentsObserver::RegisterInputEventObserver( | |
| 619 content::RenderViewHost* host) { | |
| 620 if (host != nullptr) | |
| 621 host->GetWidget()->AddInputEventObserver(this); | |
| 622 } | |
| 623 | |
| 624 void MetricsWebContentsObserver::UnregisterInputEventObserver( | |
| 625 content::RenderViewHost* host) { | |
| 626 if (host != nullptr) | |
| 627 host->GetWidget()->RemoveInputEventObserver(this); | |
| 628 } | |
| 629 | |
| 630 void MetricsWebContentsObserver::RenderViewHostChanged( | |
| 631 content::RenderViewHost* old_host, | |
| 632 content::RenderViewHost* new_host) { | |
| 633 UnregisterInputEventObserver(old_host); | |
| 634 RegisterInputEventObserver(new_host); | |
| 635 } | |
| 636 | |
| 637 bool MetricsWebContentsObserver::OnMessageReceived( | |
| 638 const IPC::Message& message, | |
| 639 content::RenderFrameHost* render_frame_host) { | |
| 640 DCHECK_CURRENTLY_ON(content::BrowserThread::UI); | |
| 641 bool handled = true; | |
| 642 IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(MetricsWebContentsObserver, message, | |
| 643 render_frame_host) | |
| 644 IPC_MESSAGE_HANDLER(PageLoadMetricsMsg_TimingUpdated, OnTimingUpdated) | |
| 645 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 646 IPC_END_MESSAGE_MAP() | |
| 647 return handled; | |
| 648 } | |
| 649 | |
| 650 void MetricsWebContentsObserver::DidStartNavigation( | |
| 651 content::NavigationHandle* navigation_handle) { | |
| 652 if (!navigation_handle->IsInMainFrame()) | |
| 653 return; | |
| 654 | |
| 655 std::unique_ptr<PageLoadTracker> last_aborted = | |
| 656 NotifyAbortedProvisionalLoadsNewNavigation(navigation_handle); | |
| 657 | |
| 658 int chain_size_same_url = 0; | |
| 659 int chain_size = 0; | |
| 660 if (last_aborted) { | |
| 661 if (last_aborted->MatchesOriginalNavigation(navigation_handle)) { | |
| 662 chain_size_same_url = last_aborted->aborted_chain_size_same_url() + 1; | |
| 663 } else if (last_aborted->aborted_chain_size_same_url() > 0) { | |
| 664 LogAbortChainSameURLHistogram( | |
| 665 last_aborted->aborted_chain_size_same_url()); | |
| 666 } | |
| 667 chain_size = last_aborted->aborted_chain_size() + 1; | |
| 668 } | |
| 669 | |
| 670 if (!ShouldTrackNavigation(navigation_handle)) | |
| 671 return; | |
| 672 | |
| 673 // TODO(bmcquade): add support for tracking prerendered pages when they become | |
| 674 // visible. | |
| 675 if (embedder_interface_->IsPrerendering(web_contents())) | |
| 676 return; | |
| 677 | |
| 678 // Pass in the last committed url to the PageLoadTracker. If the MWCO has | |
| 679 // never observed a committed load, use the last committed url from this | |
| 680 // WebContent's opener. This is more accurate than using referrers due to | |
| 681 // referrer sanitizing and origin referrers. Note that this could potentially | |
| 682 // be inaccurate if the opener has since navigated. | |
| 683 content::WebContents* opener = web_contents()->GetOpener(); | |
| 684 const GURL& opener_url = | |
| 685 !has_navigated_ && opener | |
| 686 ? web_contents()->GetOpener()->GetLastCommittedURL() | |
| 687 : GURL::EmptyGURL(); | |
| 688 const GURL& currently_committed_url = | |
| 689 committed_load_ ? committed_load_->committed_url() : opener_url; | |
| 690 has_navigated_ = true; | |
| 691 | |
| 692 // We can have two provisional loads in some cases. E.g. a same-site | |
| 693 // navigation can have a concurrent cross-process navigation started | |
| 694 // from the omnibox. | |
| 695 DCHECK_GT(2ul, provisional_loads_.size()); | |
| 696 // Passing raw pointers to observers_ and embedder_interface_ is safe because | |
| 697 // the MetricsWebContentsObserver owns them both list and they are torn down | |
| 698 // after the PageLoadTracker. The PageLoadTracker does not hold on to | |
| 699 // committed_load_ or navigation_handle beyond the scope of the constructor. | |
| 700 provisional_loads_.insert(std::make_pair( | |
| 701 navigation_handle, | |
| 702 base::WrapUnique(new PageLoadTracker( | |
| 703 in_foreground_, embedder_interface_.get(), currently_committed_url, | |
| 704 navigation_handle, chain_size, chain_size_same_url)))); | |
| 705 } | |
| 706 | |
| 707 const PageLoadExtraInfo | |
| 708 MetricsWebContentsObserver::GetPageLoadExtraInfoForCommittedLoad() { | |
| 709 DCHECK(committed_load_); | |
| 710 return committed_load_->ComputePageLoadExtraInfo(); | |
| 711 } | |
| 712 | |
| 713 void MetricsWebContentsObserver::DidFinishNavigation( | |
| 714 content::NavigationHandle* navigation_handle) { | |
| 715 if (!navigation_handle->IsInMainFrame()) | |
| 716 return; | |
| 717 | |
| 718 std::unique_ptr<PageLoadTracker> finished_nav( | |
| 719 std::move(provisional_loads_[navigation_handle])); | |
| 720 provisional_loads_.erase(navigation_handle); | |
| 721 | |
| 722 const bool should_track = | |
| 723 finished_nav && ShouldTrackNavigation(navigation_handle); | |
| 724 | |
| 725 if (finished_nav && !should_track) | |
| 726 finished_nav->StopTracking(); | |
| 727 | |
| 728 if (navigation_handle->HasCommitted()) { | |
| 729 // Ignore same-page navigations. | |
| 730 if (navigation_handle->IsSamePage()) | |
| 731 return; | |
| 732 | |
| 733 // Notify other loads that they may have been aborted by this committed | |
| 734 // load. Note that by using the committed navigation start as the abort | |
| 735 // cause, we lose data on provisional loads that were aborted by other | |
| 736 // provisional loads. Those will either be listed as ABORT_OTHER or as being | |
| 737 // aborted by this load. | |
| 738 // is_certainly_browser_timestamp is set to false because NavigationStart() | |
| 739 // could be set in either the renderer or browser process. | |
| 740 NotifyAbortAllLoadsWithTimestamp( | |
| 741 AbortTypeForPageTransition(navigation_handle->GetPageTransition()), | |
| 742 navigation_handle->NavigationStart(), false); | |
| 743 | |
| 744 if (should_track) { | |
| 745 HandleCommittedNavigationForTrackedLoad(navigation_handle, | |
| 746 std::move(finished_nav)); | |
| 747 } else { | |
| 748 committed_load_.reset(); | |
| 749 } | |
| 750 } else if (should_track) { | |
| 751 HandleFailedNavigationForTrackedLoad(navigation_handle, | |
| 752 std::move(finished_nav)); | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 // Handle a pre-commit error. Navigations that result in an error page will be | |
| 757 // ignored. Note that downloads/204s will result in HasCommitted() returning | |
| 758 // false. | |
| 759 // TODO(csharrison): Track changes to NavigationHandle for signals when this is | |
| 760 // the case (HTTP response headers). | |
| 761 void MetricsWebContentsObserver::HandleFailedNavigationForTrackedLoad( | |
| 762 content::NavigationHandle* navigation_handle, | |
| 763 std::unique_ptr<PageLoadTracker> tracker) { | |
| 764 tracker->FailedProvisionalLoad(navigation_handle); | |
| 765 | |
| 766 net::Error error = navigation_handle->GetNetErrorCode(); | |
| 767 | |
| 768 // net::OK: This case occurs when the NavigationHandle finishes and reports | |
| 769 // !HasCommitted(), but reports no net::Error. This should not occur | |
| 770 // pre-PlzNavigate, but afterwards it should represent the navigation stopped | |
| 771 // by the user before it was ready to commit. | |
| 772 // net::ERR_ABORTED: An aborted provisional load has error | |
| 773 // net::ERR_ABORTED. Note that this can come from some non user-initiated | |
| 774 // errors, such as downloads, or 204 responses. See crbug.com/542369. | |
| 775 if ((error == net::OK) || (error == net::ERR_ABORTED)) { | |
| 776 tracker->NotifyAbort(ABORT_OTHER, base::TimeTicks::Now(), true); | |
| 777 aborted_provisional_loads_.push_back(std::move(tracker)); | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 void MetricsWebContentsObserver::HandleCommittedNavigationForTrackedLoad( | |
| 782 content::NavigationHandle* navigation_handle, | |
| 783 std::unique_ptr<PageLoadTracker> tracker) { | |
| 784 if (!navigation_handle->HasUserGesture() && | |
| 785 (navigation_handle->GetPageTransition() & | |
| 786 ui::PAGE_TRANSITION_CLIENT_REDIRECT) != 0 && | |
| 787 committed_load_) | |
| 788 committed_load_->NotifyClientRedirectTo(*tracker); | |
| 789 | |
| 790 committed_load_ = std::move(tracker); | |
| 791 committed_load_->Commit(navigation_handle); | |
| 792 } | |
| 793 | |
| 794 void MetricsWebContentsObserver::NavigationStopped() { | |
| 795 NotifyAbortAllLoads(ABORT_STOP); | |
| 796 } | |
| 797 | |
| 798 void MetricsWebContentsObserver::OnInputEvent( | |
| 799 const blink::WebInputEvent& event) { | |
| 800 // Ignore browser navigation or reload which comes with type Undefined. | |
| 801 if (event.type == blink::WebInputEvent::Type::Undefined) | |
| 802 return; | |
| 803 | |
| 804 if (committed_load_) | |
| 805 committed_load_->OnInputEvent(event); | |
| 806 } | |
| 807 | |
| 808 void MetricsWebContentsObserver::DidRedirectNavigation( | |
| 809 content::NavigationHandle* navigation_handle) { | |
| 810 if (!navigation_handle->IsInMainFrame()) | |
| 811 return; | |
| 812 auto it = provisional_loads_.find(navigation_handle); | |
| 813 if (it == provisional_loads_.end()) | |
| 814 return; | |
| 815 it->second->Redirect(navigation_handle); | |
| 816 } | |
| 817 | |
| 818 void MetricsWebContentsObserver::WasShown() { | |
| 819 if (in_foreground_) | |
| 820 return; | |
| 821 in_foreground_ = true; | |
| 822 if (committed_load_) | |
| 823 committed_load_->WebContentsShown(); | |
| 824 for (const auto& kv : provisional_loads_) { | |
| 825 kv.second->WebContentsShown(); | |
| 826 } | |
| 827 } | |
| 828 | |
| 829 void MetricsWebContentsObserver::WasHidden() { | |
| 830 if (!in_foreground_) | |
| 831 return; | |
| 832 in_foreground_ = false; | |
| 833 if (committed_load_) | |
| 834 committed_load_->WebContentsHidden(); | |
| 835 for (const auto& kv : provisional_loads_) { | |
| 836 kv.second->WebContentsHidden(); | |
| 837 } | |
| 838 } | |
| 839 | |
| 840 // This will occur when the process for the main RenderFrameHost exits, either | |
| 841 // normally or from a crash. We eagerly log data from the last committed load if | |
| 842 // we have one. Don't notify aborts here because this is probably not user | |
| 843 // initiated. If it is (e.g. browser shutdown), other code paths will take care | |
| 844 // of notifying. | |
| 845 void MetricsWebContentsObserver::RenderProcessGone( | |
| 846 base::TerminationStatus status) { | |
| 847 // Other code paths will be run for normal renderer shutdown. Note that we | |
| 848 // sometimes get the STILL_RUNNING value on fast shutdown. | |
| 849 if (status == base::TERMINATION_STATUS_NORMAL_TERMINATION || | |
| 850 status == base::TERMINATION_STATUS_STILL_RUNNING) { | |
| 851 return; | |
| 852 } | |
| 853 | |
| 854 // If this is a crash, eagerly log the aborted provisional loads and the | |
| 855 // committed load. |provisional_loads_| don't need to be destroyed here | |
| 856 // because their lifetime is tied to the NavigationHandle. | |
| 857 committed_load_.reset(); | |
| 858 aborted_provisional_loads_.clear(); | |
| 859 } | |
| 860 | |
| 861 void MetricsWebContentsObserver::NotifyAbortAllLoads(UserAbortType abort_type) { | |
| 862 NotifyAbortAllLoadsWithTimestamp(abort_type, base::TimeTicks::Now(), true); | |
| 863 } | |
| 864 | |
| 865 void MetricsWebContentsObserver::NotifyAbortAllLoadsWithTimestamp( | |
| 866 UserAbortType abort_type, | |
| 867 base::TimeTicks timestamp, | |
| 868 bool is_certainly_browser_timestamp) { | |
| 869 if (committed_load_) | |
| 870 committed_load_->NotifyAbort(abort_type, timestamp, | |
| 871 is_certainly_browser_timestamp); | |
| 872 for (const auto& kv : provisional_loads_) { | |
| 873 kv.second->NotifyAbort(abort_type, timestamp, | |
| 874 is_certainly_browser_timestamp); | |
| 875 } | |
| 876 for (const auto& tracker : aborted_provisional_loads_) { | |
| 877 if (tracker->IsLikelyProvisionalAbort(timestamp)) | |
| 878 tracker->UpdateAbort(abort_type, timestamp, | |
| 879 is_certainly_browser_timestamp); | |
| 880 } | |
| 881 aborted_provisional_loads_.clear(); | |
| 882 } | |
| 883 | |
| 884 std::unique_ptr<PageLoadTracker> | |
| 885 MetricsWebContentsObserver::NotifyAbortedProvisionalLoadsNewNavigation( | |
| 886 content::NavigationHandle* new_navigation) { | |
| 887 // If there are multiple aborted loads that can be attributed to this one, | |
| 888 // just count the latest one for simplicity. Other loads will fall into the | |
| 889 // OTHER bucket, though there shouldn't be very many. | |
| 890 if (aborted_provisional_loads_.size() == 0) | |
| 891 return nullptr; | |
| 892 if (aborted_provisional_loads_.size() > 1) | |
| 893 RecordInternalError(ERR_NAVIGATION_SIGNALS_MULIPLE_ABORTED_LOADS); | |
| 894 | |
| 895 std::unique_ptr<PageLoadTracker> last_aborted_load = | |
| 896 std::move(aborted_provisional_loads_.back()); | |
| 897 aborted_provisional_loads_.pop_back(); | |
| 898 | |
| 899 base::TimeTicks timestamp = new_navigation->NavigationStart(); | |
| 900 if (last_aborted_load->IsLikelyProvisionalAbort(timestamp)) | |
| 901 last_aborted_load->UpdateAbort(ABORT_UNKNOWN_NAVIGATION, timestamp, false); | |
| 902 | |
| 903 aborted_provisional_loads_.clear(); | |
| 904 return last_aborted_load; | |
| 905 } | |
| 906 | |
| 907 void MetricsWebContentsObserver::OnTimingUpdated( | |
| 908 content::RenderFrameHost* render_frame_host, | |
| 909 const PageLoadTiming& timing, | |
| 910 const PageLoadMetadata& metadata) { | |
| 911 bool error = false; | |
| 912 if (!committed_load_) { | |
| 913 RecordInternalError(ERR_IPC_WITH_NO_RELEVANT_LOAD); | |
| 914 error = true; | |
| 915 } | |
| 916 | |
| 917 // We may receive notifications from frames that have been navigated away | |
| 918 // from. We simply ignore them. | |
| 919 if (render_frame_host != web_contents()->GetMainFrame()) { | |
| 920 RecordInternalError(ERR_IPC_FROM_WRONG_FRAME); | |
| 921 error = true; | |
| 922 } | |
| 923 | |
| 924 // For urls like chrome://newtab, the renderer and browser disagree, | |
| 925 // so we have to double check that the renderer isn't sending data from a | |
| 926 // bad url like https://www.google.com/_/chrome/newtab. | |
| 927 if (!web_contents()->GetLastCommittedURL().SchemeIsHTTPOrHTTPS()) { | |
| 928 RecordInternalError(ERR_IPC_FROM_BAD_URL_SCHEME); | |
| 929 error = true; | |
| 930 } | |
| 931 | |
| 932 if (error) | |
| 933 return; | |
| 934 | |
| 935 if (!committed_load_->UpdateTiming(timing, metadata)) { | |
| 936 // If the page load tracker cannot update its timing, something is wrong | |
| 937 // with the IPC (it's from another load, or it's invalid in some other way). | |
| 938 // We expect this to be a rare occurrence. | |
| 939 RecordInternalError(ERR_BAD_TIMING_IPC); | |
| 940 } | |
| 941 } | |
| 942 | |
| 943 bool MetricsWebContentsObserver::ShouldTrackNavigation( | |
| 944 content::NavigationHandle* navigation_handle) const { | |
| 945 DCHECK(navigation_handle->IsInMainFrame()); | |
| 946 if (!navigation_handle->GetURL().SchemeIsHTTPOrHTTPS()) | |
| 947 return false; | |
| 948 if (embedder_interface_->IsNewTabPageUrl(navigation_handle->GetURL())) | |
| 949 return false; | |
| 950 if (navigation_handle->HasCommitted()) { | |
| 951 if (navigation_handle->IsSamePage() || navigation_handle->IsErrorPage()) | |
| 952 return false; | |
| 953 const std::string& mime_type = web_contents()->GetContentsMimeType(); | |
| 954 if (mime_type != "text/html" && mime_type != "application/xhtml+xml") | |
| 955 return false; | |
| 956 } | |
| 957 return true; | |
| 958 } | |
| 959 | |
| 960 } // namespace page_load_metrics | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2177743002:
Migrate page_load_metrics out of components. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master